Super-audio frequency induction heating equipment

By designing positioning mechanisms and auxiliary mechanisms in ultra-audio induction heating equipment, using motors, gears and other components to achieve precise control of the position of the material, the problems of poor stability and difficult position adjustment when heating materials in existing equipment are solved, and the heating is improved Control and operational efficiency.

CN119095217AInactive Publication Date: 2024-12-06ZHENGZHOU YURUN ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202411191342.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-28
Publication Date
2024-12-06
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing ultra-audio induction heating equipment lacks control stability when heating materials, and cannot achieve precise adjustment of the material position, affecting operating efficiency.

Method used

An ultra-audio induction heating device including a positioning mechanism and an auxiliary mechanism is designed to achieve precise position control of the material and heating position through components such as motors, gears, racks, movable plates, guide plates, hollow frames and telescopic tubes. adjust.

Benefits of technology

Accurate heating of the material is achieved, the position of the material can be adjusted according to the needs, the control and stability of the heating is improved, and the convenience of operation is enhanced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses superaudio frequency induction heating equipment, which comprises a hollow base, and further comprises a control box fixedly connected to the right side of the base; the positioning plate is connected to the top of the base in a sliding manner; the auxiliary plate is connected into the positioning plate in a sliding manner; the heating mechanism is fixedly connected into the base; the hollow plate is fixedly connected into the control box; a material needing to be heated is placed on the positioning plate, at the moment, the motor is controlled to work, an output shaft of the motor rotates to guide the auxiliary plate to move, at the moment, the auxiliary plate and the positioning plate are matched to fix the material, and meanwhile, an electric push rod is controlled to work, so that the heating efficiency is improved. And the electric push rod can control the material to move, and the effect of accurately heating different positions of the material is achieved.
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Description

Technical Field

[0001] The invention relates to the technical field of supersonic frequency induction heating equipment, in particular to a supersonic frequency induction heating equipment. Background Art

[0002] In the prior art, supersonic frequency induction heating equipment is a device that uses supersonic frequency (usually refers to electromagnetic waves with a frequency higher than 20kHz) to heat materials. Compared with traditional induction heating technology, supersonic frequency induction heating equipment can provide more precise and efficient heating. In the prior art, when supersonic frequency induction heating equipment heats materials, the materials lack control and have poor stability. At the same time, the materials cannot be controlled and moved according to the heating requirements, which is not conducive to operation.

[0003] Therefore, the present application proposes an ultrasonic induction heating device to solve the above problems. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes an ultrasonic induction heating device.

[0005] The present invention provides an ultrasonic induction heating device, comprising a base with a hollow interior, and the ultrasonic induction heating device further comprises:

[0006] A control box, the control box is fixedly connected to the right side of the base;

[0007] A positioning plate, the positioning plate being slidably connected to the top of the base;

[0008] An auxiliary plate, wherein the auxiliary plate is slidably connected in the positioning plate;

[0009] A heating mechanism, wherein the heating mechanism is fixedly connected in the base;

[0010] A hollow plate, wherein the hollow plate is fixedly connected in the control box;

[0011] A control panel, wherein the control panel is slidably connected in the hollow panel;

[0012] A positioning mechanism and an auxiliary mechanism are arranged in the base and the control box.

[0013] Preferably, the positioning mechanism includes a motor, a gear, a rack, a movable plate, a guide plate, a hollow frame and a telescopic tube, the motor is fixedly connected to the top inner wall of the base, the gear is fixedly connected to the bottom of the motor output shaft, the movable plate is slidably connected to the bottom inner wall of the base, the rack is fixedly connected to the left side of the movable plate, and the rack is fixedly connected to the left side of the movable plate, the guide plate is slidably connected to the bottom inner wall of the base, and the guide plate is located to the right of the movable plate, the hollow frame is slidably connected to the right inner wall of the base, and the right side of the hollow frame extends into the control box, the telescopic tube is fixedly connected in the hollow frame, and the right side of the inner tube of the telescopic tube is fixedly connected to the left side of the control panel.

[0014] Furthermore, the positioning mechanism works by controlling the motor, and the motor can control the gear to rotate. At this time, the rotation of the gear can synchronously control the rack to move laterally. At the same time, the movement of the rack can push the movable plate to move. When the movable plate moves, the movable plate can assist the guide plate to move to the left. At this time, the movement of the guide plate can assist the hollow frame to move, thereby synchronously driving the telescopic tube to move.

[0015] Preferably, the bottom inner wall of the base is rotatably connected to a movable column, the left side of the movable plate is fixedly connected to a movable belt, and one end of the movable belt is fixedly connected to the left side of the guide plate, and the movable belt contacts the outer wall of the movable column.

[0016] Furthermore, when the movable plate moves, the movable plate can pull the movable belt to move, and at this time the movable belt can pull the guide plate to move under the guidance of the movable column.

[0017] Preferably, a No. 1 spring is fixedly connected to the right side of the guide plate, and one end of the No. 1 spring is fixedly connected to the right inner wall of the base. A through hole is provided on the right side of the base, and the right side of the guide plate extends into the control box and is slidably connected to the inner wall of the through hole.

[0018] Furthermore, by providing a No. 1 spring, the No. 1 spring has the effect of pulling the guide plate back to the right, and by providing a through hole, the through hole has the effect of assisting the guide plate to extend into the control box.

[0019] Preferably, an auxiliary groove is provided on the right side of the base, the hollow frame passes through the auxiliary groove and is slidably connected to the inner wall of the auxiliary groove, the bottom of the hollow frame is an inclined surface, the top of the guide plate is rotatably connected to a contact wheel, and the contact wheel is in movably contact with the inclined surface of the hollow frame, and a No. 3 spring is fixedly connected to the rear side of the hollow frame, and one end of the No. 3 spring is fixedly connected to the rear inner wall of the base.

[0020] Furthermore, by setting an auxiliary groove, the auxiliary groove has the effect of limiting the lateral movement of the hollow frame. When the guide plate moves, the guide plate can drive the contact wheel to move. At this time, the contact wheel contacts the inclined surface of the hollow frame, which facilitates the control of the lateral movement of the hollow frame.

[0021] Preferably, the auxiliary mechanism includes an electric push rod, an extension plate, a connecting plate, a driving plate and a push plate. The electric push rod is fixedly connected to the right side of the control box, the extension plate is fixedly connected to the bottom of the output end of the electric push rod, and the left side of the extension plate extends into the control box, the connecting plate is rotatably connected to the front side of the extension plate, the driving plate is slidably connected to the bottom inner wall of the control box, and the front side of the driving plate is rotatably connected to the left side of the connecting plate, the push plate is slidably connected to the top inner wall of the control box, and the left side of the push plate is in active contact with the right side of the control plate.

[0022] Furthermore, the auxiliary mechanism works by controlling the electric push rod, which can control the extension plate to rise. When the extension plate moves, the extension plate can pull the connecting plate to move. At this time, the movement of the connecting plate can synchronously pull the driving plate to move. When the driving plate moves, the driving plate can assist the push plate to move, thereby pushing the control plate to move to the left.

[0023] Preferably, the bottom of the hollow plate is rotatably connected to two rotating columns, the outer walls of the two rotating columns are sleeved with the same transmission belt, and the outer wall of the transmission belt is fixedly connected to the front side of the driving plate and the rear side of the pushing plate.

[0024] Furthermore, by setting a rotating column, the rotating column plays the role of supporting the transmission belt, and the driving plate moves to control the transmission belt to rotate. At this time, the transmission belt can synchronously control the push plate to move to the left.

[0025] Preferably, two No. 2 springs are fixedly connected to the rear side of the auxiliary plate, and one end of the two No. 2 springs are fixedly connected to the front side of the positioning plate, and a No. 4 spring is fixedly connected to the left side of the control plate, and one end of the No. 4 spring is fixedly connected to the left inner wall of the control box.

[0026] Furthermore, by setting the No. 2 spring, the No. 2 spring can push the auxiliary plate to return to its original position, and by setting the No. 4 spring, the No. 4 spring can push the control plate to return to its original position through its own elastic force.

[0027] The beneficial effects of the present invention are:

[0028] 1. Place the material to be heated on the positioning plate, and then control the output shaft of the motor to rotate. The output shaft of the motor can control the gear to rotate. At this time, the gear rotation can control the rack to move to the right through its own tooth pattern. When the rack moves, the rack can push the movable plate to move to the right. As the movable plate moves, the movable plate can synchronously pull the movable belt to move. When the movable belt moves, the movable belt can synchronously pull the guide plate to move to the left. At this time, as the guide plate moves, the guide plate can drive the contact wheel to move. When the contact wheel moves with the movement of the guide plate, the contact wheel can contact the inclined surface of the hollow frame. At this time, the contact wheel cooperates with the inclined surface of the hollow frame to control the hollow frame to move backward. At this time, as the hollow frame moves, the hollow frame can synchronously drive the telescopic tube to move. When the telescopic tube moves, the telescopic tube drives the control plate to move backward;

[0029] 2. With the movement of the control plate, the control plate can drive the auxiliary plate to move backward. At this time, the auxiliary plate cooperates with the positioning plate to fix the material. After the material is fixed, the electric push rod is controlled to work. The electric push rod can control the extension plate to rise. When the extension plate moves, the extension plate can pull the connecting plate to move. At this time, the movement of the connecting plate can synchronously pull the driving plate to move. When the driving plate moves, the driving plate can control the transmission belt to rotate;

[0030] 3. As the transmission belt rotates, the transmission belt can control the push plate to move to the left. When the push plate moves, the push plate can push the auxiliary plate and the positioning plate to move to the left, which is convenient for adjusting the material and achieving the effect of precise heating of different positions of the material.

[0031] Beneficial effect: By placing the material to be heated on the positioning plate, the motor is controlled to work. The rotation of the motor's output shaft can guide the auxiliary plate to move. At this time, the auxiliary plate cooperates with the positioning plate to fix the material. At the same time, by controlling the work of the electric push rod, the electric push rod can control the movement of the material to achieve the effect of precise heating of different positions of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A structural cross-sectional view of an ultrasonic induction heating device proposed by the present invention;

[0033] Figure 2 A three-dimensional diagram of the structure of a hollow frame and a telescopic tube of a supersonic frequency induction heating device proposed by the present invention;

[0034] Figure 3 A three-dimensional diagram of the structure of the rack and movable plate of a supersonic frequency induction heating device proposed by the present invention;

[0035] Figure 4 This is an enlarged structural diagram of structure A of a supersonic frequency induction heating device proposed by the present invention;

[0036] Figure 5 This is an enlarged view of the structure B of the ultrasonic induction heating device proposed by the present invention.

[0037] In the figure: 1. base; 2. control box; 3. gear; 4. rack; 5. movable plate; 6. movable column; 7. movable belt; 8. guide plate; 9. spring No. 1; 10. hollow frame; 11. telescopic tube; 12. control plate; 13. hollow plate; 14. positioning plate; 15. auxiliary plate; 16. spring No. 2; 17. electric push rod; 18. extension plate; 19. connecting plate; 20. driving plate; 21. rotating column; 22. transmission belt; 23. push plate; 24. heating mechanism; 25. motor; 26. spring No. 3; 27. spring No. 4. DETAILED DESCRIPTION

[0038] The present invention will be further explained below in conjunction with specific embodiments.

[0039] Example

[0040] refer to Figure 1-5 In this embodiment, a supersonic frequency induction heating device is provided, including a base 1 with a hollow interior, and the supersonic frequency induction heating device also includes:

[0041] A control box 2, which is fixedly connected to the right side of the base 1;

[0042] A positioning plate 14, the positioning plate 14 is slidably connected to the top of the base 1;

[0043] An auxiliary plate 15, the auxiliary plate 15 is slidably connected in the positioning plate 14;

[0044] A heating mechanism 24, the heating mechanism 24 is fixedly connected in the base 1;

[0045] A hollow plate 13, the hollow plate 13 is fixedly connected in the control box 2;

[0046] A control panel 12, wherein the control panel 12 is slidably connected in the hollow panel 13;

[0047] The base 1 and the control box 2 are provided with a positioning mechanism and an auxiliary mechanism.

[0048] In this embodiment, the positioning mechanism includes a motor 25, a gear 3, a rack 4, a movable plate 5, a guide plate 8, a hollow frame 10 and a telescopic tube 11. The motor 25 is fixedly connected to the top inner wall of the base 1, the gear 3 is fixedly connected to the bottom of the output shaft of the motor 25, the movable plate 5 is slidably connected to the bottom inner wall of the base 1, the rack 4 is fixedly connected to the left side of the movable plate 5, and the rack 4 is fixedly connected to the left side of the movable plate 5, the guide plate 8 is slidably connected to the bottom inner wall of the base 1, and the guide plate 8 is located on the right side of the movable plate 5, the hollow frame 10 is slidably connected to the right inner wall of the base 1, and the right side of the hollow frame 10 Extending into the control box 2, the telescopic tube 11 is fixedly connected in the hollow frame 10, and the right side of the inner tube of the telescopic tube 11 is fixedly connected to the left side of the control board 12. The positioning mechanism works by controlling the motor 25. The motor 25 can control the gear 3 to rotate. At this time, the rotation of the gear 3 can synchronously control the rack 4 to move horizontally. At the same time, the movement of the rack 4 can push the movable plate 5 to move. When the movable plate 5 moves, the movable plate 5 can assist the guide plate 8 to move to the left. At this time, the movement of the guide plate 8 can assist the hollow frame 10 to move, thereby synchronously driving the telescopic tube 11 to move.

[0049] In this embodiment, the bottom inner wall of the base 1 is rotatably connected to a movable column 6, the left side of the movable plate 5 is fixedly connected to a movable belt 7, and one end of the movable belt 7 is fixedly connected to the left side of the guide plate 8. The movable belt 7 contacts the outer wall of the movable column 6. When the movable plate 5 moves, the movable plate 5 can pull the movable belt 7 to move, and at this time the movable belt 7 can pull the guide plate 8 to move as guided by the movable column 6.

[0050] In this embodiment, a No. 1 spring 9 is fixedly connected to the right side of the guide plate 8, and one end of the No. 1 spring 9 is fixedly connected to the right inner wall of the base 1. A through hole is provided on the right side of the base 1, and the right side of the guide plate 8 extends into the control box 2 and is slidably connected to the inner wall of the through hole. By providing the No. 1 spring 9, the No. 1 spring 9 has the effect of pulling the guide plate 8 back to the right, and by providing the through hole, the through hole has the effect of assisting the guide plate 8 to extend into the control box 2.

[0051] In this embodiment, an auxiliary groove is provided on the right side of the base 1, and the hollow frame 10 passes through the auxiliary groove and is slidably connected to the inner wall of the auxiliary groove. The bottom of the hollow frame 10 is an inclined surface, and the top of the guide plate 8 is rotatably connected to a contact wheel, and the contact wheel is in active contact with the inclined surface of the hollow frame 10. A No. 3 spring 26 is fixedly connected to the rear side of the hollow frame 10, and one end of the No. 3 spring 26 is fixedly connected to the rear inner wall of the base 1. By setting the auxiliary groove, the auxiliary groove has the effect of limiting the lateral movement of the hollow frame 10. When the guide plate 8 moves, the guide plate 8 can drive the contact wheel to move. At this time, the contact wheel is in contact with the inclined surface of the hollow frame 10, which is convenient for controlling the lateral movement of the hollow frame 10.

[0052] In this embodiment, the auxiliary mechanism includes an electric push rod 17, an extension plate 18, a connecting plate 19, a driving plate 20 and a push plate 23. The electric push rod 17 is fixedly connected to the right side of the control box 2, the extension plate 18 is fixedly connected to the bottom of the output end of the electric push rod 17, and the left side of the extension plate 18 extends into the control box 2. The connecting plate 19 is rotatably connected to the front side of the extension plate 18, the driving plate 20 is slidably connected to the bottom inner wall of the control box 2, and the front side of the driving plate 20 is rotatably connected to the left side of the connecting plate 19, and the push plate 23 is slidably connected to the bottom inner wall of the control box 2. The top inner wall of the control box 2, and the left side of the push plate 23 are in active contact with the right side of the control panel 12. The auxiliary mechanism works by controlling the electric push rod 17. The electric push rod 17 can control the extension plate 18 to rise. When the extension plate 18 moves, the extension plate 18 can pull the connecting plate 19 to move. At this time, the movement of the connecting plate 19 can synchronously pull the driving plate 20 to move. When the driving plate 20 moves, the driving plate 20 can assist the push plate 23 to move, thereby pushing the control panel 12 to move to the left.

[0053] In this embodiment, the bottom of the hollow plate 13 is rotatably connected to two rotating columns 21, and the outer walls of the two rotating columns 21 are sleeved with the same transmission belt 22. The outer wall of the transmission belt 22 is fixedly connected to the front side of the driving plate 20 and the rear side of the push plate 23. By setting the rotating column 21, the rotating column 21 plays the role of carrying the transmission belt 22. The movement of the driving plate 20 can control the transmission belt 22 to rotate. At this time, the transmission belt 22 can synchronously control the push plate 23 to move to the left.

[0054] In this embodiment, two No. 2 springs 16 are fixedly connected to the rear side of the auxiliary plate 15, and one end of the two No. 2 springs 16 are fixedly connected to the front side of the positioning plate 14, and a No. 4 spring 27 is fixedly connected to the left side of the control plate 12, and one end of the No. 4 spring 27 is fixedly connected to the left side inner wall of the control box 2. By setting the No. 2 spring 16, the No. 2 spring 16 has the effect of pushing the auxiliary plate 15 to return to its position, and by setting the No. 4 spring 27, the No. 4 spring 27 can push the control plate 12 to return to its position through its own elastic force.

[0055] It should be noted that the specific type of heating mechanism 24 used is the supersonic frequency induction heating device proposed in the announcement number: CN214032652U, which will not be described in detail in this solution.

[0056] Working principle: During actual operation, the material to be heated is placed on the positioning plate 14. At this time, the output shaft of the motor 25 is controlled to rotate, and the output shaft of the motor 25 can control the gear 3 to rotate. At this time, the rotation of the gear 3 can control the rack 4 to move to the right through its own tooth pattern. When the rack 4 moves, the rack 4 can push the movable plate 5 to move to the right. As the movable plate 5 moves, the movable plate 5 can synchronously pull the movable belt 7 to move. When the movable belt 7 moves, the movable belt 7 can synchronously pull the guide plate 8 to move to the left. At this time, as the guide plate 8 moves, the guide plate 8 can drive the contact wheel to move. When the contact wheel moves with the movement of the guide plate 8, the contact wheel can contact the inclined surface of the hollow frame 10. At this time, the contact wheel cooperates with the inclined surface of the hollow frame 10 to control the hollow frame 10 to move backward. At this time, as the hollow frame 10 moves, the hollow frame 10 can synchronously drive the telescopic tube 11 to move When the telescopic tube 11 moves, the telescopic tube 11 drives the control plate 12 to move backward. As the control plate 12 moves, the control plate 12 can drive the auxiliary plate 15 to move backward. At this time, the auxiliary plate 15 cooperates with the positioning plate 14 to fix the material. After the material is fixed, the electric push rod 17 is controlled to work, and the electric push rod 17 can control the extension plate 18 to rise. When the extension plate 18 moves, the extension plate 18 can pull the connecting plate 19 to move. At this time, the movement of the connecting plate 19 can synchronously pull the driving plate 20 to move. When the driving plate 20 moves, the driving plate 20 can control the transmission belt 22 to rotate. At this time, as the transmission belt 22 rotates, the transmission belt 22 can control the push plate 23 to move to the left. When the push plate 23 moves, the push plate 23 can push the auxiliary plate 15 and the positioning plate 14 to move to the left, which is convenient for adjusting the material and achieving the effect of accurately heating different positions of the material.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultrasonic induction heating device, comprising a base (1) with a hollow interior, characterized in that: The super-frequency induction heating device also includes: A control box (2), wherein the control box (2) is fixedly connected to the right side of the base (1); A positioning plate (14), wherein the positioning plate (14) is slidably connected to the top of the base (1); An auxiliary plate (15), wherein the auxiliary plate (15) is slidably connected in the positioning plate (14); A heating mechanism (24), wherein the heating mechanism (24) is fixedly connected inside the base (1); A hollow plate (13), wherein the hollow plate (13) is fixedly connected inside the control box (2); A control panel (12), wherein the control panel (12) is slidably connected in the hollow panel (13); The base (1) and the control box (2) are provided with a positioning mechanism and an auxiliary mechanism.

2. The ultrasonic induction heating device according to claim 1, characterized in that: The positioning mechanism comprises a motor (25), a gear (3), a rack (4), a movable plate (5), a guide plate (8), a hollow frame (10) and a telescopic tube (11); the motor (25) is fixedly connected to the top inner wall of the base (1); the gear (3) is fixedly connected to the bottom of the output shaft of the motor (25); the movable plate (5) is slidably connected to the bottom inner wall of the base (1); the rack (4) is fixedly connected to the left side of the movable plate (5), and the rack (4) is fixedly connected to the left side of the movable plate (5); the guide plate (8) is slidably connected to the bottom inner wall of the base (1), and the guide plate (8) is located on the right side of the movable plate (5); the hollow frame (10) is slidably connected to the right inner wall of the base (1), and the right side of the hollow frame (10) extends into the control box (2); the telescopic tube (11) is fixedly connected to the hollow frame (10), and the right side of the inner tube of the telescopic tube (11) is fixedly connected to the left side of the control plate (12).

3. The ultrasonic induction heating device according to claim 2, characterized in that: The bottom inner wall of the base (1) is rotatably connected to a movable column (6), the left side of the movable plate (5) is fixedly connected to a movable belt (7), and one end of the movable belt (7) is fixedly connected to the left side of the guide plate (8), and the movable belt (7) is in contact with the outer wall of the movable column (6).

4. The ultrasonic induction heating device according to claim 2, characterized in that: A No. 1 spring (9) is fixedly connected to the right side of the guide plate (8), and one end of the No. 1 spring (9) is fixedly connected to the right inner wall of the base (1). A through hole is provided on the right side of the base (1), and the right side of the guide plate (8) extends into the control box (2) and is slidably connected to the inner wall of the through hole.

5. The ultrasonic induction heating device according to claim 2, characterized in that: An auxiliary groove is provided on the right side of the base (1), the hollow frame (10) passes through the auxiliary groove and is slidably connected to the inner wall of the auxiliary groove, the bottom of the hollow frame (10) is an inclined surface, the top of the guide plate (8) is rotatably connected to a contact wheel, and the contact wheel is in active contact with the inclined surface of the hollow frame (10), and a No. 3 spring (26) is fixedly connected to the rear side of the hollow frame (10), and one end of the No. 3 spring (26) is fixedly connected to the rear inner wall of the base (1).

6. The ultrasonic induction heating device according to claim 1, characterized in that: The auxiliary mechanism comprises an electric push rod (17), an extension plate (18), a connecting plate (19), a driving plate (20) and a push plate (23); the electric push rod (17) is fixedly connected to the right side of the control box (2); the extension plate (18) is fixedly connected to the bottom of the output end of the electric push rod (17), and the left side of the extension plate (18) extends into the control box (2); the connecting plate (19) is rotatably connected to the front side of the extension plate (18); the driving plate (20) is slidably connected to the bottom inner wall of the control box (2), and the front side of the driving plate (20) is rotatably connected to the left side of the connecting plate (19); the push plate (23) is slidably connected to the top inner wall of the control box (2), and the left side of the push plate (23) is in active contact with the right side of the control plate (12).

7. The ultrasonic induction heating device according to claim 6, characterized in that: The bottom of the hollow plate (13) is rotatably connected to two rotating columns (21), the outer walls of the two rotating columns (21) are sleeved with a same transmission belt (22), and the outer wall of the transmission belt (22) is fixedly connected to the front side of the driving plate (20) and the rear side of the pushing plate (23).

8. The ultrasonic induction heating device according to claim 1, characterized in that: The rear side of the auxiliary plate (15) is fixedly connected to two No. 2 springs (16), and one end of the two No. 2 springs (16) is fixedly connected to the front side of the positioning plate (14); the left side of the control plate (12) is fixedly connected to a No. 4 spring (27), and one end of the No. 4 spring (27) is fixedly connected to the left inner wall of the control box (2).