High frequency heating apparatus

Claim 2

In a high frequency heating apparatus comprising a cabinet for defining a heating chamber having an access opening at one side thereof, a door mounted on said cabinet for closing said access opening, a high frequency oscillator for radiating high frequency electromagnetic waves in said heating chamber, and a locking mechanism for locking said door in the closed position, the improvement which comprises: a door operating handle fixedly and immovably connected to said door for opening said door; an operating member for said locking mechanism, said operating member being movably mounted on said door operating handle outside said heating chamber for operation when said handle is engaged and pulled; a switch coupled to said high frequency oscillator, said switch being mounted in said cabinet; and means interlocked with said locking mechanism for operating said switch to deenergize said high frequency oscillator when said operating member is operated to unlock said locking mechanism.

Claim 3

In a high frequency heating apparatus comprising a cabinet for defining a heating chamber having an access opening at one side thereof, a door mounted on said cabinet for closing said access opening, a high frequency oscillator for radiating high frequency electromagnetic waves in said heating chamber, and a locking mechanism for locking said door in the closed position, the improvement which comprises: a door operating handle fixedly and immovably connected to said door for opening said door; an operating member for said locking mechanism, said operating member being movably mounted on said door operating handle outside said heating chamber for operation when said handle is engaged and pulled; a switch coupled to said high frequency oscillator, said switch being mounted in said cabinet; and means interlocked with said locking mechanism for operating said switch to deenergize said high frequency oscillator when said operating member is operated to unlock said locking mechanism.

Claim 4

In a high frequency heating apparatus comprising a cabinet for defining a heating chamber having an access opening at one side thereof, a door mounted on said cabinet for closing said access opening, a high frequency oscillator for radiating high frequency electromagnetic waves in said heating chamber, and a locking mechanism for locking said door in the closed position, the improvement which comprises: a door operating handle fixedly and immovably connected to said door for opening said door; an operating member for said locking mechanism, said operating member being movably mounted on said door operating handle outside said heating chamber for operation when said handle is engaged and pulled; a switch coupled to said high frequency oscillator, said switch being mounted in said cabinet; and means interlocked with said locking mechanism for operating said switch to deenergize said high frequency oscillator when said operating member is operated to unlock said locking mechanism.

Claim 5

The high frequency heating apparatus according to claim 1 wherein; said locking mechanism comprises a locking member secured to said cabinet, a rotating lever pivotally connected to said door at one end thereof and provided at the other end with a hook cooperating with said locking member, and a spring connected between said rotating lever and said door for biasing said rotating lever to cause said hook to engage said locking member when said door is closed; said operating member comprises an operating lever movably mounted on said handle, and a connecting rod operatively interconnecting said operating lever and said rotating lever for rotating the said rotating lever against the action of said spring when said operating lever is operated to disengage said hook from said locking member; and said switch is provided with an actuator which is engaged by said hook when it engages said locking member for closing said switch and released when said hook is unlocked for opening said switch.

Claim 6

The high frequency heating apparatus according to claim 2 wherein said operating lever is disposed between the grip of said handle and the front surface of said door confronting said grip and is contained in said handle to be movable Towards and away from the front surface of said door.

Claim 7

The high frequency heating apparatus according to claim 1 wherein a door operating handle is mounted on said door; said locking mechanism comprises a locking member secured to said cabinet, a movable rod mounted on said door to be movable in the longitudinal direction, and a spring connected between said door and said movable rod for causing one end of said rod to engage said locking member when said door is closed; said operating member comprises an operating rod movably connected to said handle; and said switch comprises an actuator which is engaged by said movable rod when it engages said locking member for closing said switch and released when said movable rod disengages said locking member for opening said switch.

Claim 8

The high frequency heating apparatus according to claim 1 wherein said locking mechanism comprises a locking member secured to said cabinet, a rotating lever pivotally mounted on said door and having a hook at one end thereof, and a spring connected between said rotating lever and said door for biasing said rotating lever for causing said lever to engage said locking member when said door is closed; said operating member comprises an operating rod integral with said rotating lever and extending to the outside of said door; and said switch comprises an actuator which is engaged by said hook when it engages said locking member for closing said switch and released when said hook disengages said locking member for opening said switch.

Claim 9

The high frequency heating apparatus according to claim 1 wherein an operating handle is mounted on said door; said locking mechanism comprises a locking member secured to said cabinet, a rotating lever rotatably mounted on said door, said rotating lever having a hook at one end, and a spring connected between said rotating lever and said door for biasing said rotating lever for causing said hook to engage said locking member when said door is closed; said operating member of said locking mechanism comprises an operating lever slidably mounted on said door and including an end abutting the end of said rotating lever opposite said hook; and said switch comprises an actuator which is engaged by said hook when it engages said locking member for closing said switch and released when said hook disengages said locking member for opening said switch.

Claim 10

The high frequency heating apparatus according to claim 1 wherein said locking mechanism comprises a locking member and a locking rod having a hook at one end thereof; said operating member of said locking mechanism comprises a slidable member slidably mounted on said door, said slidable member being connected to said locking rod, and a spring connected between said slidable member and said door for biasing said slidable member for causing said hook to engage said locking member when said door is closed; and said switch comprises an acutator which is engaged by said hook when it engages said locking member for closing said switch and released when said hook disengages said locking member for opening said switch.

Claim 11

The high frequency heating apparatus according to claim 2 wherein said switch actuator is interposed between said hook and said locking member when said hook engages with said locking member for locking said door.

Claim 12

The high frequency heating apparatus according to claim 2 wherein said operating member includes spring means interposed between said handle and said operating lever to bias said operating lever away from said handle and toward said door.