Double-linkage door lock structure and pressure steam oven

Abstract

The invention relates to the technical field of steam ovens, in particular to a double-linkage door lock structure and a pressure steam oven.The double-linkage door lock structure comprises a face frame, and a first lock catch and a second lock catch are fixed to the face frame; the first end of the door body is hinged to the face frame, the second end of the door body is provided with a first door hook, a second door hook and a handle mechanism, the first door hook and the second door hook are hinged to the door body, the first door hook corresponds to the first lock catch, the second door hook corresponds to the second lock catch, and the handle mechanism is rotatably arranged on the door body. The handle mechanism is in driving connection with the first door hook and the second door hook through the linkage device, and the handle mechanism is rotated to drive the linkage device to drive the first door hook and the second door hook to be locked with or released from the first lock catch and the second lock catch respectively; a pulling force assembly is arranged between the handle mechanism and the door body, and when the first door hook and the second door hook are locked with the first lock catch and the second lock catch respectively, the pulling force assembly can pull the handle mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of steam ovens, in particular to a double-linkage door lock structure and a pressure steam oven. Background Art

[0002] At present, the steam ovens on the market can be used to bake bread slices, roast meat, steam and bake food, etc., and are deeply loved by consumers. However, since the time for steaming and baking ribs, whole chickens and other foods is relatively long and the energy consumption is relatively high, high-pressure steam ovens have emerged to speed up the baking of food. Since the pressure of high-pressure steam ovens is relatively high, the conventional door structure cannot close the door tightly, resulting in steam leakage from the door and the pressure is difficult to meet the requirements. In order to achieve door sealing, some products use a double door lock mechanism, which is not only costly but also inconvenient to operate.

[0003] The utility model patent with publication number CN210144465U discloses a door lock device for a pressure steam oven, comprising a box body and a door lock device, wherein the box body defines an inner tank of the oven cooking space and has a box door, the box door provides an entrance to the inner tank and seals the inner tank when the box door is in a closed position; the door lock device is used to open the entrance of the inner tank or seal the entrance of the inner tank, and the door lock device is arranged on the box door; the door lock device comprises a handle, a cam, a hinge, a buckle and a lock, the handle passes through the top surface of the box door and is movably connected to the cam, the cam is fixedly connected to the hinge, the buckle is arranged on the hinge through a buckle fixing nail, the lock is arranged on the upper end wall of the inner tank, and the buckle and the lock are arranged one by one; the rotating handle drives the hinge to move in the horizontal direction through the cam, thereby driving the buckle to make a circular motion to achieve locking or disengagement between the buckle and the lock. However, the prior art still has structural defects, there is no locking function after locking the door, and when subjected to pressure, the handle may rotate by itself, causing the buckle and the lock to disengage.

[0004] Therefore, there is still room for improvement in the existing technology. Summary of the invention

[0005] In order to solve the problem that the prior art has no locking function after locking the door, and the handle may rotate automatically when subjected to pressure, causing the buckle and the lock to disengage, the present invention provides a double-linkage door lock structure and a pressure steam oven.

[0006] In order to achieve the above object, the technical solution applied by the present invention is as follows:

[0007] A double-linkage door lock structure comprises a face frame on which a first lock catch and a second lock catch are fixed; a door body, wherein a first end of the door body is hinged on the face frame, and a first door hook, a second door hook and a handle mechanism are provided at the second end of the door body, the first door hook and the second door hook are hinged on the door body, the first door hook is arranged corresponding to the first lock catch, and the second door hook is arranged corresponding to the second lock catch, the handle mechanism is rotatably arranged on the door body, the handle mechanism is drivingly connected to the first door hook and the second door hook through a linkage device, and the linkage device is driven by rotating the handle mechanism to drive the first door hook and the second door hook to be locked or disengaged with the first lock catch and the second lock catch respectively; a pulling force component is provided between the handle mechanism and the door body, and when the first door hook and the second door hook are locked with the first lock catch and the second lock catch respectively, the pulling force component can pull the handle mechanism to prevent the handle mechanism from rotating by itself and causing the first door hook and the second door hook to be disengaged from the first lock catch and the second lock catch respectively. Such an arrangement has a compact structure and is easy to operate. The first door hook and the second door hook are driven to act simultaneously by rotating the handle mechanism, so that the first door hook and the second door hook can be locked or released with the first lock catch and the second lock catch respectively at the same time, thereby realizing a double linkage switch. When the first door hook and the second door hook are locked with the first lock catch and the second lock catch respectively, under the action of the tension component, the handle mechanism will not rotate automatically, so that the linkage device will not act automatically, so that the first door hook and the second door hook can remain locked with the first lock catch and the second lock catch respectively, and will not be released.

[0008] According to the above scheme, the pulling force assembly includes a torsion spring. When the first door hook and the second door hook are locked with the first lock catch and the second lock catch respectively, the elastic force of the torsion spring is used to tighten the handle mechanism so that the handle mechanism will not rotate by itself, thereby keeping the first door hook and the second door hook locked with the first lock catch and the second lock catch respectively.

[0009] According to the above scheme, the handle mechanism includes a handle and a handle seat. The handle is fixedly connected to the handle seat after passing through the door body. A handle cover is provided between the handle and the door body. The first end of the torsion spring is fixed on the handle seat, and the second end of the torsion spring is fixed on the door body.

[0010] According to the above scheme, the linkage device includes a first connecting rod, a first swing rod, a driving wheel, a driven wheel, a second swing rod and a second connecting rod; the first connecting rod is hinged to the door body, the first end of the first connecting rod is hinged to the first door hook, and the second end of the first connecting rod is fixed with a first pin; the first end of the first swing rod is provided with a first sliding groove, the first sliding groove is slidably connected to the first pin, the second end of the first swing rod is fixedly connected to the driving wheel, the driving wheel is hinged to the door body, and the handle mechanism is fixedly connected to the driving wheel; the second connecting rod is hinged to the door body, the first end of the second connecting rod is hinged to the second door hook, and the second end of the second connecting rod is fixed with a second pin; the first end of the second swing rod is provided with a second sliding groove, the second sliding groove is slidably connected to the second pin, the second end of the second swing is fixedly connected to the driven wheel, the driven wheel is hinged to the door body, and the driven wheel and the driving wheel are meshingly connected.

[0011] According to the above scheme, the linkage device includes a first connecting rod, a first rocker arm, a driving wheel, a driven wheel, a second rocker arm and a second connecting rod; the first connecting rod is hinged to the door body, the first end of the first connecting rod is hinged to the first door hook, the second end of the first connecting rod is hinged to the first end of the first rocker arm, the second end of the first rocker arm is fixedly connected to the driving wheel, the driving wheel is hinged to the door body, and the handle mechanism is fixedly connected to the driving wheel; the second connecting rod is hinged to the door body, the first end of the second connecting rod is hinged to the second door hook, the second end of the second connecting rod is hinged to the first end of the second rocker arm, the second end of the second rocker arm is fixedly connected to the driven wheel, the driven wheel is hinged to the door body, and the driven wheel and the driving wheel are meshingly connected.

[0012] According to the above scheme, the first door hook is hinged to the door body through the first rotating shaft, the first connecting rod is hinged to the door body through the second rotating shaft, the first connecting rod is hinged to the first door hook through the first hinge shaft, the driving wheel is hinged to the door body through the third rotating shaft, the driven wheel is hinged to the door body through the fourth rotating shaft, the second connecting rod is hinged to the door body through the fifth rotating shaft, the second connecting rod is hinged to the second door hook through the second hinge shaft, and the second door hook is hinged to the door body through the sixth rotating shaft.

[0013] According to the above solution, the driving wheel is provided with a first transmission tooth, the driven wheel is provided with a second transmission tooth, and the second transmission tooth is meshingly connected with the first transmission tooth.

[0014] According to the above scheme, the door body includes an inner door frame, a reinforcement plate, a door hinge, a door glass, an outer door frame and a hinge seat; the inner door frame and the outer door frame are fixedly connected, the reinforcement plate, the door hinge, the door glass and the hinge seat are fixed between the inner door frame and the outer door frame, the door hinge is fixed on the reinforcement plate, the hinge seat is fixed on the door hinge, the first door hook, the second door hook and the linkage device are hinged on the hinge seat; the inner door frame, the reinforcement plate and the hinge seat are all provided with a first through hole and a second through hole corresponding to the first lock catch and the second lock catch; the handle mechanism can be rotatably arranged on the outer door frame.

[0015] According to the above solution, the hinge seat is provided with an adjustment slot. In practical applications, the adjustment slot is arranged in cooperation with the rotating shafts of the two connecting rods to facilitate adjustment of the positions of the two connecting rods on the hinge seat.

[0016] According to the above solution, the first lock buckle and the second lock buckle are vertically arranged on both sides of the face frame. In this way, when the first door hook and the second door hook are locked, the first lock buckle and the second lock buckle are inserted into the first lock buckle and the second lock buckle from the outside, which has a better locking effect and reduces the probability of disengagement compared with the prior art that uses a horizontally arranged lock buckle.

[0017] A pressure steam oven described in the present invention comprises a box body and the above-mentioned double-linked door lock structure, an inner cavity is formed in the box body, a surface frame is fixed on the opening of the inner cavity, a pressure relief valve is provided on the rear side of the box body, the door body and the opening of the inner cavity are locked by the double-linked door lock structure, when the pressure of the inner cavity exceeds the preset pressure of the inner cavity, the steam is discharged through the pressure relief valve to maintain the pressure of the inner cavity.

[0018] Beneficial effects of the present invention:

[0019] The present invention is configured in this way, with a compact structure and convenient operation. The handle mechanism is driven to drive the first door hook and the second door hook to operate simultaneously, thereby enabling the first door hook and the second door hook to be respectively locked or released with the first lock catch and the second lock catch at the same time, thereby realizing a double linkage switch. When the first door hook and the second door hook are respectively locked with the first lock catch and the second lock catch at the same time, under the action of the tension component, the handle mechanism will not rotate automatically, thereby causing the linkage device to not operate automatically, thereby enabling the first door hook and the second door hook to remain locked with the first lock catch and the second lock catch respectively, and not be released. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the door body of the present invention being opened;

[0021] Figure 2 This is a schematic diagram of the door body of the present invention being closed;

[0022] Figure 3 is a cross-sectional view of the linkage device after the door is locked according to the present invention;

[0023] Figure 4 yes Figure 4 A magnified image of position A in the middle;

[0024] Figure 5 is a cross-sectional view of the linkage device after the door body is released of the present invention;

[0025] Figure 6 yes Figure 5 Enlarged view of position B in the middle;

[0026] Figure 7 It is an exploded view of the door body and linkage device of the present invention;

[0027] Figure 8 It is a schematic diagram of the assembly of the door body and the handle mechanism of the present invention;

[0028] Fig. 9 yes Figure 8 Cross-sectional view at the middle CC position;

[0029] Fig.10 It is a schematic diagram of the internal structure of a pressure steam oven.

[0030] In the figure:

[0031] 1. Box body; 10. Control panel; 11. Face frame; 12. First lock; 13. Second lock; 14. Inner cavity; 15. Pressure relief valve; 16. Water tank assembly; 17. Fan assembly; 18. Heat dissipation assembly; 19. Steam valve; 2. Door body; 201. Inner door frame; 202. Reinforcement plate; 203. Door hinge; 204. Door glass; 205. Outer door frame; 206. Hinge seat; 207. First through hole; 208. Second through hole; 209. Adjustment slot; 21. Handle; 211. Handle cover; 212. Torsion spring; 213. Handle seat; 2 2. First door hook; 221. First rotating shaft; 23. First connecting rod; 231. First hinge shaft; 232. Second rotating shaft; 233. First pin; 24. First swing arm; 241. First slide groove; 25. Driving wheel; 251. Third rotating shaft; 252. First transmission tooth; 26. Driven wheel; 261. Fourth rotating shaft; 262. Second transmission tooth; 27. Second swing arm; 271. Second slide groove; 28. Second connecting rod; 281. Second hinge shaft; 282. Fifth rotating shaft; 283. Second pin; 29. ​​Second door hook; 291. Sixth rotating shaft. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is described below in conjunction with the accompanying drawings and embodiments.

[0033] Embodiment 1:

[0034] like Figures 1 to 9As shown, a double-linkage door lock structure of the present invention comprises a face frame 11, on which a first lock catch 12 and a second lock catch 13 are fixed; a door body 2, wherein a first end of the door body 2 is hinged to the face frame 11, and a first door hook 22, a second door hook 29 and a handle mechanism are arranged at the second end of the door body 2, the first door hook 22 and the second door hook 29 are hinged to the door body 2, the first door hook 22 is arranged corresponding to the first lock catch 12, the second door hook 29 is arranged corresponding to the second lock catch 13, and the handle mechanism can be rotatably arranged on the door body 2, and the handle mechanism is connected to the door body 2 through a linkage device. The first door hook 22 and the second door hook 29 are driven and connected, and the linkage device is driven by rotating the handle mechanism to drive the first door hook 22 and the second door hook 29 to be locked or disengaged with the first lock buckle 12 and the second lock buckle 13 respectively; a tension component is provided between the handle mechanism and the door body 2. When the first door hook 22 and the second door hook 29 are locked with the first lock buckle 12 and the second lock buckle 13 respectively, the tension component can pull the handle mechanism to prevent the handle mechanism from rotating by itself and causing the first door hook 22 and the second door hook 29 to be disengaged from the first lock buckle 12 and the second lock buckle 13 respectively. Such arrangement has a compact structure and is easy to operate. The first door hook 22 and the second door hook 29 are driven to act simultaneously by rotating the handle mechanism, so that the first door hook 22 and the second door hook 29 can be locked or released with the first lock buckle 12 and the second lock buckle 13 respectively at the same time, thereby realizing a double linkage switch. When the first door hook 22 and the second door hook 29 are locked with the first lock buckle 12 and the second lock buckle 13 respectively, under the action of the tension component, the handle mechanism will not rotate by itself, so that the linkage device will not act by itself, so that the first door hook 22 and the second door hook 29 remain locked with the first lock buckle 12 and the second lock buckle 13 respectively, and will not be released.

[0035] In practical applications, the first lock buckle 12 and the second lock buckle 13 are preferably square lock buckles.

[0036] Furthermore, the pulling assembly includes a torsion spring 212. When the first door hook 22 and the second door hook 29 are respectively locked with the first lock buckle 12 and the second lock buckle 13, the elastic force of the torsion spring 212 tightens the handle mechanism so that the handle mechanism does not rotate by itself, thereby keeping the first door hook 22 and the second door hook 29 locked with the first lock buckle 12 and the second lock buckle 13 respectively.

[0037] Furthermore, the handle mechanism includes a handle 21 and a handle seat 213. The handle 21 passes through the door body 2 and is fixedly connected to the handle seat 213. A handle cover 211 is provided between the handle 21 and the door body 2. The first end of the torsion spring 212 is fixed to the handle seat 213, and the second end of the torsion spring 212 is fixed to the door body 2.

[0038] Further, the linkage device includes a first connecting rod 23, a first swing rod 24, a driving wheel 25, a driven wheel 26, a second swing rod 27 and a second connecting rod 28; the first connecting rod 23 is hinged on the door body 2, the first end of the first connecting rod 23 is hinged on the first door hook 22, and the second end of the first connecting rod 23 is fixed with a first pin 233; the first end of the first swing rod 24 is provided with a first slide groove 241, the first slide groove 241 is slidably connected to the first pin 233, and the second end of the first swing rod 24 is fixedly connected to the driving wheel 25. The driving wheel 25 is hinged on the door body 2, and the handle mechanism is fixedly connected to the driving wheel 25; the second connecting rod 28 is hinged on the door body 2, the first end of the second connecting rod 28 is hinged to the second door hook 29, and the second end of the second connecting rod 28 is fixed with a second pin 283; the first end of the second swing rod 27 is provided with a second slide groove 271, the second slide groove 271 is slidably connected with the second pin 283, the second end of the second swing rod 27 is fixedly connected to the driven wheel 26, the driven wheel 26 is hinged on the door body 2, and the driven wheel 26 and the driving wheel 25 are meshingly connected.

[0039] Further, the first door hook 22 is hinged to the door body 2 through the first rotating shaft 221, the first connecting rod 23 is hinged to the door body 2 through the second rotating shaft 232, the first connecting rod 23 is hinged to the first door hook 22 through the first hinge shaft 231, the driving wheel 25 is hinged to the door body 2 through the third rotating shaft 251, the driven wheel 26 is hinged to the door body 2 through the fourth rotating shaft 261, the second connecting rod 28 is hinged to the door body 2 through the fifth rotating shaft, the second connecting rod 28 is hinged to the second door hook 29 through the second hinge shaft 281, and the second door hook 29 is hinged to the door body 2 through the sixth rotating shaft 291.

[0040] Specifically, the driving wheel 25 is provided with a first transmission tooth 252 , and the driven wheel 26 is provided with a second transmission tooth 262 . The second transmission tooth 262 is meshedly connected with the first transmission tooth 252 .

[0041] Further, the door body 2 includes an inner door frame 201, a reinforcement plate 202, a door hinge 203, a door glass 204, an outer door frame 205 and a hinge seat 206; the inner door frame 201 and the outer door frame 205 are fixedly connected, the reinforcement plate 202, the door hinge 203, the door glass 204 and the hinge seat 206 are fixed between the inner door frame 201 and the outer door frame 205, the door hinge 203 is fixed on the reinforcement plate 202, the hinge seat 206 is fixed on the door hinge 203, the first door hook 22, the second door hook 29 and the linkage device are hinged on the hinge seat 206; the inner door frame 201, the reinforcement plate 202 and the hinge seat 206 are all provided with a first through hole 207 and a second through hole 208 corresponding to the first lock buckle 12 and the second lock buckle 13; the handle mechanism can be rotatably arranged on the outer door frame 205.

[0042] Furthermore, an adjustment slot is provided on the hinge seat 206. In practical applications, the adjustment slot is arranged in cooperation with the rotation shafts of the two connecting rods, so as to facilitate adjustment of the positions of the two connecting rods on the hinge seat 206.

[0043] Furthermore, the first lock buckle 12 and the second lock buckle 13 are vertically arranged on both sides of the face frame 11. In this way, when the first door hook 22 and the second door hook 29 are locked, they are inserted into the first lock buckle 12 and the second lock buckle 13 from the outside, and the locking effect is better. Compared with the prior art that uses a horizontally arranged lock buckle, the probability of disengagement is reduced.

[0044] like Fig.10 As shown, a pressure steam oven described in the present invention includes a box body 1 and the above-mentioned double-linked door lock structure, an inner cavity 14 is formed in the box body 1, a face frame 11 is fixed on the opening of the inner cavity 14, a pressure relief valve 15 is provided on the rear side of the box body 1, and the door body 2 and the opening of the inner cavity 14 are locked by the double-linked door lock structure. When the pressure of the inner cavity 14 exceeds the preset pressure of the inner cavity 14, the gas is discharged through the pressure relief valve 15 to maintain the pressure of the inner cavity 14.

[0045] In actual application, the box body 1 also includes an outer shell, an inner box body, a water tank assembly 16, a fan assembly 17, a heat dissipation assembly 18, a steam valve 19 and a control panel 10, and the control panel 10 is provided with a start switch and a pressure setting switch.

[0046] Working principle of the present invention:

[0047] In the initial state, the handle 21 is in a horizontal position. Figure 1 As shown;

[0048] When locking the door, the handle 21 is pressed downward, the torsion spring 212 is in the torsion energy storage state, the handle 21 drives the driving wheel 25 to rotate downward, the driving wheel 25 drives the driven wheel 26 to rotate downward, and when the driving wheel 25 and the driven wheel 26 rotate, the first swing rod 24 and the second swing rod 27 are driven to rotate downward, and the first connecting rod 23 and the second connecting rod 28 are driven to rotate one end downward and the other end upward, so as to drive the first door hook 22 and the second door hook 29 to rotate and open around the first rotating shaft 221 and the sixth rotating shaft 291 respectively, avoiding the space of the first lock buckle 12 and the second lock buckle 13; then the door body 1 is closed, the handle 21 is released, the torsion spring 212 is in the torsion release state, and the handle 21 is reset under the rebound force of the torsion spring 212, so as to drive the first door hook 22 and the second door hook 29 to be respectively stuck in the first lock buckle 12 and the second lock buckle 13, so that the door body 1 is self-locked on the face frame 11, as shown in FIG. Figure 2 and 3 As shown, at this time, the first connecting rod 23, the first swing rod 24, the driving wheel 25, the driven wheel 26, the second swing rod 27 and the second connecting rod 28 are locked in the same straight line;

[0049] When opening the door, the handle 21 is pressed downward, and the torsion spring 212 is in a torsion energy storage state. The handle 21 drives the driving wheel 25 to rotate downward, and the driving wheel 25 drives the driven wheel 26 to rotate downward. When the driving wheel 25 and the driven wheel 26 rotate, the first swing rod 24 and the second swing rod 27 are driven to rotate downward, and the first connecting rod 23 and the second connecting rod 28 are driven to rotate one end downward and the other end upward, so as to drive the first door hook 22 and the second door hook 29 to rotate and open around the first rotating shaft 221 and the sixth rotating shaft 291 respectively, so as to drive the first door hook 22 and the second door hook 29 to disengage from the first lock buckle 12 and the second lock buckle 13 respectively. Figure 5 As shown, the door body 1 can be opened from the face frame 11 at this time.

[0050] Embodiment 2:

[0051] In this embodiment, the linkage device includes a first connecting rod 23, a first swing rod 24, a driving wheel 25, a driven wheel 26, a second swing rod 27 and a second connecting rod 28; the first connecting rod 23 is hinged on the door body 2, the first end of the first connecting rod 23 is hinged on the first door hook 22, the second end of the first connecting rod 23 is hinged on the first end of the first swing rod 24, the second end of the first swing rod 24 is fixedly connected to the driving wheel 25, the driving wheel 25 is hinged on the door body 2, and the handle mechanism is fixedly connected to the driving wheel 25; the second connecting rod 28 is hinged on the door body 2, the first end of the second connecting rod 28 is hinged on the second door hook 29, the second end of the second connecting rod 28 is hinged on the first end of the second swing rod 27, the second end of the second swing rod 27 is fixedly connected to the driven wheel 26, the driven wheel 26 is hinged on the door body 2, and the driven wheel 26 and the driving wheel 25 are meshingly connected.

[0052] The difference between the second embodiment and the first embodiment is that the connection relationship between the connecting rod and the rocker arm is different. The rest of the structure and principle are the same as those of the first embodiment and will not be repeated.

[0053] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which belong to the protection scope of the present invention.

Claims

1. A double linkage door lock structure, characterized in that: include: A face frame (11), wherein a first lock buckle (12) and a second lock buckle (13) are fixed to the face frame (11); A door body (2), wherein a first end of the door body (2) is hinged on a face frame (11), and a second end of the door body (2) is provided with a first door hook (22), a second door hook (29) and a handle mechanism, wherein the first door hook (22) and the second door hook (29) are hinged on the door body (2), the first door hook (22) is arranged correspondingly to the first lock catch (12), and the second door hook (29) is arranged correspondingly to the second lock catch (13), and the handle mechanism is rotatably arranged on the door body (2), and the handle mechanism is drivingly connected to the first door hook (22) and the second door hook (29) through a linkage device, and the linkage device is driven by rotating the handle mechanism to drive the first door hook (22) and the second door hook (29) to be locked or released with the first lock catch (12) and the second lock catch (13) respectively; A tension component is provided between the handle mechanism and the door body (2). When the first door hook (22) and the second door hook (29) are respectively locked with the first lock buckle (12) and the second lock buckle (13), the tension component can pull the handle mechanism to prevent the handle mechanism from rotating by itself and causing the first door hook (22) and the second door hook (29) to be respectively disengaged from the first lock buckle (12) and the second lock buckle (13).

2. A double linkage door lock structure according to claim 1, characterized in that: The pulling force assembly comprises a torsion spring (212). When the first door hook (22) and the second door hook (29) are respectively locked with the first lock buckle (12) and the second lock buckle (13), the elastic force of the torsion spring (212) tightens the handle mechanism so that the handle mechanism does not rotate by itself, thereby keeping the first door hook (22) and the second door hook (29) locked with the first lock buckle (12) and the second lock buckle (13).

3. A double linkage door lock structure according to claim 2, characterized in that: The handle mechanism comprises a handle (21) and a handle seat (213); the handle (21) is fixedly connected to the handle seat (213) after passing through the door body (2); a handle cover (211) is provided between the handle (21) and the door body (2); a first end of the torsion spring (212) is fixed to the handle seat (213); and a second end of the torsion spring (212) is fixed to the door body (2).

4. A double linkage door lock structure according to claim 1, characterized in that: The linkage device comprises a first connecting rod (23), a first swing rod (24), a driving wheel (25), a driven wheel (26), a second swing rod (27) and a second connecting rod (28); the first connecting rod (23) is hinged on the door body (2); the first end of the first connecting rod (23) is hinged on the first door hook (22); the second end of the first connecting rod (23) is fixed with a first pin (233); the first end of the first swing rod (24) is provided with a first sliding groove (241); the first sliding groove (241) is slidably connected to the first pin (233); the second end of the first swing rod (24) is fixedly connected to the driving wheel (25); the driving wheel (25 ) is hinged on the door body (2), and the handle mechanism is fixedly connected to the driving wheel (25); the second connecting rod (28) is hinged on the door body (2), the first end of the second connecting rod (28) is hinged to the second door hook (29), and the second end of the second connecting rod (28) is fixed with a second pin (283); the first end of the second swing rod (27) is provided with a second slide groove (271), the second slide groove (271) is slidably connected to the second pin (283), the second end of the second swing rod (27) is fixedly connected to the driven wheel (26), the driven wheel (26) is hinged on the door body (2), and the driven wheel (26) and the driving wheel (25) are meshingly connected.

5. A double linkage door lock structure according to claim 1, characterized in that: The linkage device comprises a first connecting rod (23), a first swing rod (24), a driving wheel (25), a driven wheel (26), a second swing rod (27) and a second connecting rod (28); the first connecting rod (23) is hinged on the door body (2); a first end of the first connecting rod (23) is hinged on the first door hook (22); a second end of the first connecting rod (23) is hinged on the first end of the first swing rod (24); a second end of the first swing rod (24) is fixedly connected to the driving wheel (25); the driving wheel (25) is hinged on the first door hook (22); a second end of the first connecting rod (23) is hinged on the first end of the first swing rod (24); a second end of the first swing rod (24) is fixedly connected to the driving wheel (25); ) is hinged on the door body (2), and the handle mechanism is fixedly connected to the driving wheel (25); the second connecting rod (28) is hinged on the door body (2), the first end of the second connecting rod (28) is hinged to the second door hook (29), the second end of the second connecting rod (28) is hinged to the first end of the second swing rod (27), the second end of the second swing rod (27) is fixedly connected to the driven wheel (26), the driven wheel (26) is hinged on the door body (2), and the driven wheel (26) and the driving wheel (25) are meshingly connected.

6. A double linkage door lock structure according to any one of claims 4 or 5, characterized in that: The first door hook (22) is hinged to the door body (2) through a first rotating shaft (221), the first connecting rod (23) is hinged to the door body (2) through a second rotating shaft (232), the first connecting rod (23) is hinged to the first door hook (22) through a first hinge shaft (231), the driving wheel (25) is hinged to the door body (2) through a third rotating shaft (251), the driven wheel (26) is hinged to the door body (2) through a fourth rotating shaft (261), the second connecting rod (28) is hinged to the door body (2) through a fifth rotating shaft, the second connecting rod (28) is hinged to the second door hook (29) through a second hinge shaft (281), and the second door hook (29) is hinged to the door body (2) through a sixth rotating shaft (291).

7. A double linkage door lock structure according to any one of claims 4 or 5, characterized in that: The driving wheel (25) is provided with a first transmission tooth (252), and the driven wheel (26) is provided with a second transmission tooth (262), and the second transmission tooth (262) is meshingly connected with the first transmission tooth (252).

8. The double linkage door lock structure according to claim 1, characterized in that: The door body (2) comprises an inner door frame (201), a reinforcing plate (202), a door hinge (203), a door glass (204), an outer door frame (205) and a hinge seat (206); the inner door frame (201) and the outer door frame (205) are fixedly connected, the reinforcing plate (202), the door hinge (203), the door glass (204) and the hinge seat (206) are fixed between the inner door frame (201) and the outer door frame (205), and the door hinge (203) is fixed to the reinforcing plate. (202), the hinge seat (206) is fixed on the door hinge (203), the first door hook (22), the second door hook (29) and the linkage device are hinged on the hinge seat (206); the inner door frame (201), the reinforcement plate (202) and the hinge seat (206) are all provided with a first through hole (207) and a second through hole (208) corresponding to the first lock catch (12) and the second lock catch (13); the handle mechanism can be rotatably arranged on the outer door frame (205).

9. A double linkage door lock structure according to claim 8, characterized in that: The hinge seat (206) is provided with an adjustment slot.

10. A double linkage door lock structure according to claim 1, characterized in that: The first lock buckle (12) and the second lock buckle (13) are vertically arranged on both sides of the face frame (11).

11. A pressure steam oven, characterized in that: It comprises a box body (1) and a double-linked door lock structure as described in any one of claims 1 to 10, wherein an inner cavity (14) is formed in the box body (1), the face frame (11) is fixed on the opening of the inner cavity (14), and a pressure relief valve (15) is provided on the rear side of the box body (1), and the door body (2) and the opening of the inner cavity (14) are locked by the double-linked door lock structure. When the pressure of the inner cavity (14) exceeds the preset pressure of the inner cavity (14), the gas is discharged through the pressure relief valve (15) to maintain the pressure of the inner cavity (14).

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