A positive pressure forming device for dental membranes

Abstract

The present invention discloses a positive pressure forming device for dental membranes, which comprises a frame. A bottom device, a heating and pressing device and a transmission device are arranged on the frame. The bottom device includes a base, a breathable plate, a breathable plate seat, a locking mechanism and a dental mold seat. The breathable plate seat is installed in the base, the breathable plate is installed on the breathable plate seat, and the dental mold seat is located on the breathable plate. A dental model is placed on the dental mold seat. The transmission device drives the heating and pressing device to move towards the bottom device, and the heating and pressing device is fixed to the bottom device through the locking mechanism to complete the positive pressure forming of the dental model. The positive pressure forming device for dental membranes provided by the present invention integrates heating and pressing in one device, and completes the heating and pressing forming of the dental model at one time, with simple structure and high production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical equipment, and particularly relates to a dental diaphragm positive pressure forming device. Background Art

[0002] The tooth model is placed on the workbench, the diaphragm is placed on the diaphragm rack, the diaphragm is softened by heating, and then positive pressure is provided by compressed air to make the diaphragm completely adhere to the tooth model for forming. The formed diaphragm cavity completely coincides with the tooth, and it is mainly used for dental correction or retention after correction.

[0003] Existing tooth forming equipment has many problems and disadvantages. The negative pressure forming machine will cause the diaphragm not to fit tightly with the tooth model due to insufficient pressure, and wearing it on the patient's teeth cannot achieve the corrective effect. The imported positive pressure laminating machine abroad divides heating and pressurization into two accessories. First, it is heated and softened in the heating chamber, and then the diaphragm is rotated 180 degrees. During the rotation process, the softened diaphragm will deform due to the action of gravity, resulting in uneven thickness of the diaphragm after pressurization. At the same time, the operation of the two accessories is complex and the equipment cost is high.

[0004] In the existing hot pressing process, the traditional equipment often causes the tooth model to deform, resulting in forming failure. Therefore, there is a particular need for a combined hot pressing forming device to solve the problems existing in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a dental diaphragm positive pressure forming device with high production efficiency and low production cost.

[0006] To solve the above technical problems, the technical solution of the present invention is: a dental diaphragm positive pressure forming device, including a frame, on which a bottom device, a heating and pressurizing device, and a transmission device are provided. The bottom device includes a base, a ventilation plate, a ventilation plate seat, a locking mechanism, and a tooth mold seat. The ventilation plate seat is installed in the base, the ventilation plate is installed on the ventilation plate seat, and the tooth mold seat is located on the ventilation plate; the tooth model is placed on the tooth mold seat, the transmission device drives the heating and pressurizing device to move towards the bottom device, and the heating and pressurizing device is fixed to the bottom device through the locking mechanism to complete the positive pressure forming of the tooth model.

[0007] Preferably, the locking mechanism includes a locking rotation handle, a locking rotation rod, a locking connecting rod, and a locking buckle. The end of the locking rotation handle is connected to the end of the locking rotation rod, the other end of the locking rotation rod is rotatably connected to the locking connecting rod, and the end of the locking buckle passes through the base and is connected to the locking connecting rod. The locking rotation handle drives the locking rotation rod to move, so that the locking buckle moves in the base.

[0008] Preferably, the locking rotation rod is in a "T" - shaped structure.

[0009] Preferably, the heating and pressurizing device includes a diaphragm holder, a heating and pressurizing cover, a terminal, an infrared heating tube, an air pipe joint, a diaphragm, and a connecting plate. The heating and pressurizing cover is placed on the diaphragm holder, the infrared heating tube is located inside the heating and pressurizing cover, the diaphragm is located inside the diaphragm holder, the terminal is located at the top of the heating and pressurizing cover, the end of the terminal is connected to the infrared heating tube, the connecting plate is located at the top of the heating and pressurizing cover, and the air pipe interface passes through the connecting plate and communicates with the inside of the heating and pressurizing cover.

[0010] Preferably, the diaphragm holder is in a circular ring structure, the middle of the diaphragm holder is in a concave structure, and the diaphragm is located in the middle of the diaphragm holder.

[0011] Preferably, a protective cover is provided on the outer cover of the heating and pressurizing cover, and a protective cover through hole is provided on the protective cover.

[0012] Preferably, the transmission device includes a base, a transmission slide rail, a transmission slider, a first transmission link, a second transmission link, a transmission rotating shaft, a transmission pin screw, and a transmission handle. The lower end of the transmission slide rail is connected to the base, the transmission slider is slidably connected to the transmission slide rail, a connecting plate is provided on the transmission slider, the connecting plate is connected to the end of the first transmission link, the other end of the first transmission link is rotatably connected to the end of the second transmission link, the other end of the second transmission link is sleeved on the transmission rotating shaft, the transmission pin screw passes through the inside of the transmission rotating shaft and is connected to the base, so that the transmission rotating shaft can rotate around the transmission pin screw, the transmission handle is connected to the transmission rotating shaft, and when the staff rotates the transmission handle, the transmission rotating shaft is driven to rotate, and then the connecting plate is driven to move up and down along the transmission slide rail through the first transmission link and the second transmission link.

[0013] Preferably, the first transmission link is in a long strip structure, through holes of the first transmission link are respectively provided at both ends of the first transmission link, a pin passes through the through hole of the first transmission link and is connected to the connecting plate, so that the first transmission link is rotatably connected to the connecting plate, a link pin and a locking nut are arranged on the other end of the first transmission link through which the pin passes, the link pin passes through the first transmission link and the second transmission link in sequence and cooperates with the locking nut, so that the first transmission link and the second transmission link can rotate relative to each other.

[0014] The beneficial effects of the present invention are as follows: The dental diaphragm positive pressure forming device provided by the present invention integrates heating and pressurization in one device, and the dental model is heated and pressurized and formed at one time, with a simple structure and high production efficiency. At the same time, through the connection mode of the transmission slider and the transmission slide rail, the forming effect is good and the hot pressing forming position is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a dental diaphragm positive pressure forming device of the present invention;

[0016] Figure 2It is a top - view structural schematic diagram of the bottom device of the present invention;

[0017] Figure 3 It is a side - view structural schematic diagram of the bottom device of the present invention;

[0018] Figure 4 It is an exploded structural schematic diagram of the bottom device of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the locking mechanism of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the heating and pressurizing device of the present invention;

[0021] Figure 7 It is a top - view structural schematic diagram of the heating and pressurizing device of the present invention;

[0022] Figure 8 It is a sectional structural schematic diagram of the heating and pressurizing device of the present invention;

[0023] Figure 9 It is a structural schematic diagram of the infrared heating tube of the present invention;

[0024] Figure 10 It is a structural schematic diagram of the transmission device of the present invention.

[0025] Explanation of reference numerals: 1. Bottom device; 2. Heating and pressurizing device; 3. Transmission device; 10. Base; 11. Ventilation plate; 12. Ventilation plate seat; 13. Locking mechanism; 130. Locking rotation handle; 131. Locking rotation rod; 132. Locking connecting rod; 133. Locking buckle; 20. Diaphragm holder; 21. Heating and pressurizing cover; 22. Terminal; 23. Infrared heating tube; 24. Air pipe joint; 25. Diaphragm; 27. Pressure die ring; 26. Connecting plate; 28. Pressure die ring; 30. Transmission slide rail; 31. Transmission slider; 32. First transmission connecting rod; 33. Second transmission connecting rod; 34. Transmission rotating shaft; 35. Transmission pin screw; 36. Transmission handle. Detailed implementation manners

[0026] The following further describes the present invention in conjunction with the accompanying drawings and specific embodiments:

[0027] Such as Figures 1 to 10As shown in the figure, a positive pressure forming device for dental diaphragms provided by the present invention includes a frame, on which a bottom device 1, a heating and pressurizing device 2, and a transmission device 3 are provided. The bottom device 1 includes a base 10, a ventilation plate 11, a ventilation plate seat 12, a locking mechanism 13, and a dental mold seat. The ventilation plate seat 12 is installed in the base 10, the ventilation plate 11 is installed on the ventilation plate seat 12, and the dental mold seat is located on the ventilation plate 11. The dental model is placed on the dental mold seat. The transmission device 3 drives the heating and pressurizing device 2 to move towards the bottom device 1, and the heating and pressurizing device 2 is fixed to the bottom device 1 through the locking mechanism 13 to complete the positive pressure forming of the dental model.

[0028] The locking mechanism 13 includes a locking rotation handle 130, a locking rotation rod 131, a locking connecting rod 132, and a lock catch 133. The end of the locking rotation handle 130 is connected to the end of the locking rotation rod 131. The other end of the locking rotation rod 131 is rotatably connected to the locking connecting rod 132. The end of the lock catch 133 passes through the base 10 and is connected to the locking connecting rod 132. The locking rotation handle 130 drives the locking rotation rod 131 to move, so that the lock catch 133 moves within the base 10.

[0029] The locking rotation rod 131 is a "T" - shaped structure. There is a through - hole on the locking rotation rod 131, and a rotating pin is inserted through the through - hole of the locking rotation rod. The top of the rotating pin is connected to the base 10. By manually moving the locking rotation handle 130, the lock catch 133 moves, thereby locking the heating and pressurizing device 2. The structure of the lock catch 133 is a bent structure. By the contact of the bent part at the top of the lock catch 133 with the heating and pressurizing device 2, the heating and pressurizing device 2 is locked to ensure the stability of the whole process. As Figures 3 to 5 As shown in the figure, the heating and pressurizing device 2 includes a diaphragm frame 20, a heating and pressurizing cover 21, a terminal block 22, an infrared heating tube 23, an air pipe joint 24, a diaphragm 25, and a connecting plate 26. The heating and pressurizing cover 21 is placed on the diaphragm frame 20. The infrared heating tube 24 is located inside the heating and pressurizing cover 21. The diaphragm 25 is located inside the diaphragm frame 20. The terminal block 22 is located at the top of the heating and pressurizing cover 21. The end of the terminal block 22 is connected to the infrared heating tube 23. The connecting plate 26 is located at the top of the heating and pressurizing cover 21. The air pipe interface 24 passes through the connecting plate 26 and is communicated with the inside of the heating and pressurizing cover 21.

[0030] The diaphragm frame 20 is a circular ring - shaped structure. The middle of the diaphragm frame 20 is an inward - concave structure. The diaphragm 25 is located in the middle of the diaphragm frame 20. Both ends of the diaphragm frame 20 protrude upward to form a first diaphragm frame support block and a second diaphragm frame support block. A diaphragm frame handle is connected to the first diaphragm frame support block. The second diaphragm frame support block is rotatably connected to the bottom of the heating and pressurizing cover 21 through a pin. Specifically, the pin passes through the second diaphragm frame support block and the bottom of the heating and pressurizing cover 21 in sequence, and the heating and pressurizing cover 21 can rotate around the pin.

[0031] The heating and pressurizing cover 21 is of a cylindrical structure. The lower end face of the heating and pressurizing cover 21 is concave to form a cavity. The infrared heating tube 23 is located in the cavity and is connected to the terminal 22. A fixing member for the heating and pressurizing cover is provided in the cavity of the heating and pressurizing cover 21. The infrared heating tube 23 is connected to the fixing member for the heating and pressurizing cover, and the fixing member for the heating and pressurizing cover fixes the infrared heating tube 23 inside the heating and pressurizing cover.

[0032] During actual use, the fixing member for the heating and pressurizing cover is a mature existing fixing tubular part. The number of the fixing members for the heating and pressurizing cover is multiple, which respectively fix the infrared heating tube 23, so as to ensure that the infrared heating tube 23 can be stable inside the heating and pressurizing cover 21.

[0033] The number of the terminals 22 is two, which are respectively connected to both ends of the infrared heating tube 23. The other ends of the terminals 22 are located outside the heating and pressurizing cover 21. During use, the terminals 22 are electrically connected to an external power supply, and the external power supply supplies power to the infrared heating tube 23, so that the infrared heating tube 23 generates heat.

[0034] The infrared heating tube 23 is of an annular structure. The infrared heating tube 23 is a mature existing technical device, which has the advantages of high thermal efficiency, rapid temperature rise, power saving, long service life, etc.

[0035] A blowing member is installed inside the heating and pressurizing cover 21. The air pipe joint 24 is connected to the blowing member through the connecting plate 26. Gas enters from the air pipe joint 24, passes through the connecting plate 26, and is blown into the inside of the heating and pressurizing cover 21 by the blowing member.

[0036] In this embodiment, in addition to blowing and pressurizing when pressurization is required, after the heating and pressurization are completed, the blowing member blows air into the heating and pressurizing cover to make a spiral rotation along the inner wall to dissipate heat from the heating and pressurizing cover. The blowing member is a mature existing technical device.

[0037] The connecting plate 26 is of an "L" - shaped structure. The end of the connecting plate 26 is fixedly connected to the top of the heating and pressurizing cover 21. The connecting plate 26 is provided with a connecting plate hole and a connecting plate groove. One end of the connecting plate hole is connected to the air pipe joint 24, the other end of the connecting plate hole is connected to the blowing member, and the end of the terminal 22 is located in the connecting plate groove.

[0038] A pressing die ring 27 is further provided inside the diaphragm holder 20. The pressing die ring 27 is located above the diaphragm 25. O - ring seals are respectively provided at the upper and lower ends of the pressing die ring 27. The diaphragm holder 20 and the heating and pressurizing cover 21 are sealed through the O - ring seals.

[0039] During the use of the present invention, the diaphragm holder 20 and the heating and pressurizing cover 21 are connected to form a sealed cavity. The external air source is connected to the tracheal joint 24 through a pipeline, and the compressed gas sequentially passes through the tracheal joint 24, the connecting plate hole and the blowing member and enters the heating and pressurizing cover 21, and the air pressure is applied to the diaphragm 25. At the same time, the external power supply supplies power to the infrared heating tube 23 through the terminal 22, and the infrared heating tube 23 generates heat. During use, the diaphragm 25 contacts the product to be formed, and through the heat generated by the infrared heating tube 23 and the compressed gas introduced, the diaphragm 25 has the effects of heating and pressurizing on the forming process of the product. After the heating and pressurizing forming is completed, the external power supply is turned off, the infrared heating tube 23 stops heating, the heating and pressurizing cover 21 is opened, and the external air source introduces gas to cool down the infrared heating tube 23.

[0040] A protective cover 28 is provided on the outer cover of the heating and pressurizing cover 21, and a through hole of the protective cover is provided on the protective cover 28. The protective cover 28 can play a role in protecting the heating and pressurizing cover 21.

[0041] The specific process of locking the bottom device 1 and the heating and pressurizing device 2 is as follows: The staff manually moves the locking rotation handle 130, driving the locking rotation rod 131 to rotate synchronously. During the rotation of the locking rotation rod 131, the locking connecting rod 132 is driven to rotate, and the bottom of the lock catch 133 is fixedly connected to the end of the locking connecting rod 132. Therefore, when the locking connecting rod 132 rotates, the lock catch 133 is driven to rotate. The outer shape of the heating and pressurizing cover 21 is stepped. When the lock catch 133 rotates, the bent part at the top of the lock catch 133 abuts against the outer surface of the heating and pressurizing cover 21, thereby completing the locking. Rotating the locking rotation handle 130 in the reverse direction, the lock catch 133 is separated from the heating and pressurizing cover 21.

[0042] As Figure 6 and Figure 7 shown, the transmission device 3 includes a base, a transmission slide rail 30, a transmission slider 31, a transmission first connecting rod 32, a transmission second connecting rod 33, a transmission rotating shaft 34, a transmission pin screw 35 and a transmission handle 36. The lower end of the transmission slide rail 30 is connected to the base, and the transmission slider 31 is slidably connected to the transmission slide rail 30. A connecting plate is provided on the transmission slider 31, and the connecting plate is connected to the end of the transmission first connecting rod 32. The other end of the transmission first connecting rod 32 is rotatably connected to the end of the transmission second connecting rod 33. The other end of the transmission second connecting rod 33 is sleeved on the transmission rotating shaft 34. The transmission pin screw 35 passes through the inside of the transmission rotating shaft 34 and is connected to the base, so that the transmission rotating shaft 34 can rotate around the transmission pin screw 35. The transmission handle 36 is connected to the transmission rotating shaft 34. During the process of the staff rotating the transmission handle 36, the transmission rotating shaft 34 is driven to rotate, and then the connecting plate is driven to move up and down along the transmission slide rail 30 through the transmission first connecting rod 32 and the transmission second connecting rod 33.

[0043] The transmission slide rail 30 is vertically connected to the base, and the end of the transmission slider 31 is concave to form a transmission slider groove. The transmission slider 31 is clamped on the transmission slide rail 30 through the transmission slider groove, so that the transmission slider 31 slides up and down along the transmission slide rail 30.

[0044] The first transmission link 32 is a long strip structure, and the two ends of the first transmission link 32 are respectively provided with first transmission link through holes, and the pins pass through the first transmission link through holes and are connected to the connecting plate, so that the first transmission link 32 is rotatably connected to the connecting plate. The other end of the first transmission link 32 is penetrated by a link pin and a locking nut, and the link pin passes through the first transmission link 32 and the second transmission link 33 in turn and cooperates with the locking nut, so that the first transmission link 32 and the second transmission link 33 can rotate relative to each other, thereby driving the connecting plate to move synchronously.

[0045] During use, the second transmission connecting rod 33 rotates, and through the transmission of the first transmission connecting rod 32, the connecting plate is driven to move up and down along the transmission slide rail 30.

[0046] A second transmission link through hole is provided at the end of the second transmission link 33, and a second transmission link connecting hole is provided at the other end of the second transmission link 33. The link pin is passed through the second transmission link through hole, and the end of the transmission shaft 34 is passed through the second transmission link connecting hole.

[0047] The cross section of the connecting hole of the second transmission connecting rod is rectangular, and the two short sides of the rectangle are arc-shaped. When the transmission shaft 34 rotates, the second transmission connecting rod 33 is driven to rotate synchronously.

[0048] The transmission shaft 34 is a cylindrical structure, and is provided with a transmission shaft through hole and a transmission shaft fixing hole. The axis of the transmission shaft through hole is the same as the axis of the transmission shaft 34, and the axis of the transmission shaft fixing hole is perpendicular to the axis of the transmission shaft through hole.

[0049] The cross section of the end of the transmission shaft 34 is a rectangular structure, and the second transmission connecting rod 33 is sleeved on the end of the transmission shaft 34 through the second transmission connecting rod connecting hole. The rectangular end of the transmission shaft 34 is located in the second transmission connecting rod connecting hole, so that the transmission shaft 34 is connected to the second transmission connecting rod 33.

[0050] The transmission pin screw 35 is a rotating body structure, and the transmission pin screw 35 includes a transmission pin screw threaded section, a transmission pin screw bare rod section and a transmission pin screw nut which are fixedly connected in sequence. The transmission pin screw threaded section of the transmission pin screw 35 is connected to the base, and the transmission shaft 34 can rotate around the transmission pin screw bare rod section.

[0051] The transmission handle 36 is of a rotary body structure. The end of the transmission handle 36 is inserted into the transmission rotating shaft fixing hole, so that the transmission handle 36 drives the transmission shaft 34 to rotate when it rotates. The structure of the transmission handle 36 can be changed according to the operator and the set requirements during actual use.

[0052] During use, the connecting plate is connected to the heating and pressurizing cover 21. The operator manually moves the transmission handle 36, so that the transmission rotating shaft 34 rotates. When the transmission rotating shaft 34 rotates, it drives the second transmission link 33 to rotate, and then drives the connecting plate to move up and down along the transmission slide rail 30 through the first transmission link 32. Thus, the operator can avoid direct contact with the heating and pressurizing cover 21, and further ensure the movement of the heating and pressurizing cover 21 to complete the lifting operation.

[0053] Place the dental model on the dental mold base, energize the infrared heating tube 23 through an external power source. The infrared heating tube transfers heat to the diaphragm 25. When the heating temperature reaches the set state, move the transmission handle 36, so that the heating and pressurizing device 2 moves downward. The diaphragm holder 20 contacts the base 10, and by moving the locking and rotating handle 130, the lock catch 133 locks the diaphragm holder 20 and the base 10. Then, compressed air is input through the air pipe joint 24 by an external air source to pressurize the heated diaphragm 25. The diaphragm 25 contacts the dental model, so as to achieve the purpose of positive pressure forming of the dental model.

[0054] Those of ordinary skill in the art will realize that the embodiments described herein are for helping the reader understand the principles of the present invention, and it should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations without departing from the essence of the present invention according to the technical revelations disclosed in the present invention, and these deformations and combinations are still within the protection scope of the present invention.

Claims

1. A dental diaphragm positive pressure forming device, characterized in that: It includes a frame, on which a bottom device (1), a heating and pressing device (2) and a transmission device (3) are provided. The bottom device (1) includes a base (10), a ventilation plate (11), a ventilation plate seat (12), a locking mechanism (13) and a dental mold seat. The ventilation plate seat (12) is installed in the base (10), the ventilation plate (11) is installed on the ventilation plate seat (12), and the dental mold seat is located on the ventilation plate (11). The dental model is placed on the dental mold seat. The transmission device (3) drives the heating and pressing device (2) to move towards the bottom device (1), and the heating and pressing device (2) is fixed to the bottom device (1) through the locking mechanism (13) to complete the positive pressure forming of the dental model. The locking mechanism (13) includes a locking rotation handle (130), a locking rotation rod (131), a locking connecting rod (132) and a locking buckle (133). The end of the locking rotation handle (130) is connected to the end of the locking rotation rod (131). The other end of the locking rotation rod (131) is rotatably connected to the locking connecting rod (132). The end of the locking buckle (133) passes through the base (10) and is connected to the locking connecting rod (132). The locking rotation handle (130) drives the locking rotation rod (131) to move, so that the locking buckle (133) moves in the base (10). The locking rotation rod (131) is of a "T" - shaped structure. There is a through - hole on the locking rotation rod (131), and a rotating pin is inserted through the through - hole of the locking rotation rod. The top of the rotating pin is connected to the base (10). By manually moving the locking rotation handle (130), the locking buckle (133) moves, thereby locking the heating and pressing device (2). The structure of the locking buckle (133) is a bent structure. The heating and pressing device (2) is locked by the contact of the bent part at the top of the locking buckle (133) with the heating and pressing device (2). The heating and pressing device (2) includes a diaphragm frame (20), a heating and pressing cover (21), a terminal block (22), an infrared heating tube (23), an air pipe joint (24), a diaphragm (25) and a connecting plate (26). The heating and pressing cover (21) is placed on the diaphragm frame (20). The infrared heating tube (23) is located inside the heating and pressing cover (21). The diaphragm (25) is located inside the diaphragm frame (20). The terminal block (22) is located at the top of the heating and pressing cover (21), and the end of the terminal block (22) is connected to the infrared heating tube (23). The connecting plate (26) is located at the top of the heating and pressing cover (21). The air pipe interface (24) passes through the connecting plate (26) and is communicated with the inside of the heating and pressing cover (21). The locking buckle (133) locks the diaphragm frame (20) and the base (10). The diaphragm frame (20) is of a circular - ring structure, and the middle of the diaphragm frame (20) is an inward - concave structure. The diaphragm (25) is located in the middle of the diaphragm frame (20). A protective cover (28) is provided on the outer cover of the heating and pressing cover (21), and there is a through - hole on the protective cover (28).

2. The positive pressure forming device for dental diaphragm according to claim 1, characterized in that: The transmission device (3) includes a base, a transmission slide rail (30), a transmission slider (31), a first transmission connecting rod (32), a second transmission connecting rod (33), a transmission rotating shaft (34), a transmission pin screw (35) and a transmission handle (36). The lower end of the transmission slide rail (30) is connected to the base. The transmission slider (31) is slidably connected to the transmission slide rail (30). A connecting plate is provided on the transmission slider (31), and the connecting plate is connected to the end of the first transmission connecting rod (32). The other end of the first transmission connecting rod (32) is rotatably connected to the end of the second transmission connecting rod (33). The other end of the second transmission connecting rod (33) is sleeved on the transmission rotating shaft (34). The transmission pin screw (35) passes through the inside of the transmission rotating shaft (34) and is connected to the base, so that the transmission rotating shaft (34) can rotate around the transmission pin screw (35). The transmission handle (36) is connected to the transmission rotating shaft (34). When the staff rotates the transmission handle (36), the transmission rotating shaft (34) is driven to rotate, and then the connecting plate is driven to move up and down along the transmission slide rail (30) through the first transmission connecting rod (32) and the second transmission connecting rod (33).

3. The positive pressure forming device for dental diaphragm according to claim 2, wherein: The first transmission connecting rod (32) is of a long strip structure. Transmission first connecting rod through holes are respectively formed at both ends of the first transmission connecting rod (32). A pin passes through the transmission first connecting rod through holes and is connected to the connecting plate, so that the first transmission connecting rod (32) is rotatably connected to the connecting plate. A connecting rod pin and a locking nut are arranged on the other end of the first transmission connecting rod (32) through which the pin passes. The connecting rod pin passes through the first transmission connecting rod (32) and the second transmission connecting rod (33) in sequence and is matched with the locking nut, so that the first transmission connecting rod (32) and the second transmission connecting rod (33) can rotate relative to each other.

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