A transmission structure

Abstract

A transmission structure provided by the present invention belongs to the technical field of reclosing circuit breakers, and includes: a fixed plate connected to a handle for being driven, and the handle is rotatably connected in a shell; the fixed plate has an extension end extending from the top of the handle toward a direction away from the first position; a connecting shaft; the transmission structure of the present invention, through the setting of the extension end, enables the connecting shaft and the handle to be eccentrically set. When the handle is in the first position, the movement arc trajectory of the handle is lower than the interference part at the rear end. The eccentric setting reserves enough space for the interference part position, so that the connecting shaft can avoid the interference part, making the space layout in the shell more compact, reducing the overall volume of the reclosing switch, and saving costs.

Description

Technical Field

[0001] The invention relates to the technical field of reclosing circuit breakers, and in particular to a transmission structure. Background Art

[0002] A reclosing circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. A reclosing switch is a device that can automatically reclose a reclosing circuit breaker after it trips.

[0003] During the reclosing process, the handle of the reclosing switch needs to be moved from the first position to the second position. In order to prevent the handle and the rear gear from interfering with each other, sufficient space needs to be left in the shell, which increases the overall volume of the reclosing circuit breaker and increases the production cost. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that a large space is reserved for the movement of the handle in the shell to prevent interference between the handle and the rear gear, thereby increasing the volume of the reclosing circuit breaker, thereby providing a transmission structure.

[0005] The present invention provides a transmission structure, comprising:

[0006] A fixing plate connected to a handle for being driven, the handle being rotatably connected in the housing, the handle having a first position in the housing for rotating to a first end and a second position for rotating to a second end; the fixing plate having an extension end extending from the top end of the handle in a direction away from the first position;

[0007] A connecting shaft, vertically connected to the extended end of the fixing plate;

[0008] A connecting rod has one end connected to the connecting shaft and the other end suitable for connecting to the driving device.

[0009] As a preferred solution, the connecting rod is a "Z"-shaped connecting rod; and a waist-shaped hole is provided at one end of the connecting rod close to the handle.

[0010] As a preferred embodiment, the handle includes a handle body and a handle cap mounted on the upper end of the handle body, a first mounting hole is provided on the top of the handle cap, and a first fastener is fixed to the handle body through the first mounting hole; a fixing plate is fixed to the top of the handle cap, and a barrier is provided between the fixing plate and the first fastener.

[0011] As a preferred solution, the barrier is a red steel cardboard or glue layer structure.

[0012] As a preferred solution, the handle includes a handle body and a handle cap sleeved on the upper end of the handle body, and a connecting piece is embedded in the handle cap; the fixing plate is fixed to the connecting piece by a second fastener.

[0013] As a preferred solution, the driving device is connected to the connecting rod via a driven gear; the driving device includes: a manual operating mechanism and an automatic operating mechanism.

[0014] As a preferred solution, when the handle is switched from the first position to the second position, the top surface of the handle is always lower than the lower surface of the driven gear.

[0015] As a preferred solution, one end of the connecting rod is connected to the driven gear through a rocker arm; the driven gear is a "Z"-shaped connecting rod.

[0016] As a preferred solution, the manual operating mechanism includes:

[0017] A metal bracket connected inside the housing;

[0018] A manual driving rod is rotatably connected to the metal bracket; one end of the manual driving rod passes through the metal bracket, and the other end is suitable for driving operation;

[0019] A manual drive gear is connected to the bottom end of the manual drive rod and is suitable for being driven to rotate by the manual drive rod; the manual drive gear is meshed with the driven gear; a limit rod crosses the manual drive rod; the center of the manual drive gear has a one-way tooth structure for cooperating with the limit rod.

[0020] As a preferred solution, the automatic operating mechanism comprises:

[0021] An automatic driving gear, one end of which meshes with the driven gear;

[0022] The driving motor has a driving end connected to the automatic driving gear.

[0023] The technical solution of the present invention has the following advantages:

[0024] 1. The transmission structure provided by the present invention comprises: a handle, a fixing plate, a connecting shaft and a connecting rod; a fixing plate is arranged on the handle, an extending end is arranged on the fixing plate in a direction away from the first position, and the connecting shaft is arranged on the extending end; through the arrangement of the extending end, the connecting shaft and the handle are arranged eccentrically, when the handle is located at the first position, the movement arc trajectory of the handle is lower than the interference member at the rear end, and the eccentric arrangement reserves enough space for the interference member position to avoid the contact between the connecting shaft and the rear gear, so that the space layout in the housing is more compact, the overall volume of the reclosing switch is reduced, and the cost is saved;

[0025] At the same time, the lever arm of the opening and closing force is lengthened, reducing the actual operating torque of the product and making operation more labor-saving.

[0026] 2. In the transmission structure provided by the present invention, the connecting rod is a "Z"-shaped connecting rod, which enables reliable assembly of the product in the first position and the second position. At the same time, when the handle is in the second position, the "Z"-shaped setting of the connecting rod can avoid the parts at the lower end of the connecting rod.

[0027] 3. The transmission structure provided by the present invention has a connecting piece arranged in the handle, which can not only realize the connection between the handle and the fixed plate, but also enhance the bearing capacity of the handle; placing a barrier in the threaded hole of the handle can increase the creepage distance and enhance the insulation pressure resistance, and can also play the role of using the barrier to resist (the fixed plate resists the barrier, and the barrier resists the screw) when the screw between the handle body and the handle cap is loose, to prevent the screw from falling off completely and causing the connection between the two to be destroyed.

[0028] 4. In the transmission structure provided by the present invention, when the handle is switched from the first position to the second position, the top surface of the handle is always lower than the lower surface of the driven gear. This can greatly reduce the size of the handle, making the overall structure more compact, reducing the overall volume of the reclosing switch, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A perspective view of the shell.

[0031] Figure 2 for Figure 1 A three-dimensional view of the first cover body in FIG.

[0032] Figure 3 for Figure 2 Magnified view of area A in FIG.

[0033] Figure 4 for Figure 1 A three-dimensional view of the second cover body.

[0034] Figure 5 for Figure 4 Magnified view of area B in FIG.

[0035] Figure 6 for Figure 4 Magnified view of area C.

[0036] Figure 7 A top view of the shell.

[0037] Figure 8 for Figure 7 Cross-sectional view along line DD.

[0038] Fig. 9 for Figure 8 Magnified view of region F.

[0039] Fig.10 for Figure 7 Cross-sectional view along line EE.

[0040] Fig.11 for Fig.10 Magnified view of the middle G region.

[0041] Fig.12 It is a three-dimensional diagram of the transmission mechanism in the housing.

[0042] Fig.13 It is a three-dimensional diagram of the transmission structure when the handle in the shell is in the second position.

[0043] Fig.14 for Fig.13 main view.

[0044] Fig.15 It is a three-dimensional diagram of the transmission structure when the handle in the shell is in the first position.

[0045] Fig.16 for Fig.15 main view.

[0046] Fig.17 This is an exploded view of the handle.

[0047] Fig.18 for Fig.17 Side cross-sectional view of the handle cap in FIG.

[0048] Fig.19 It is a three-dimensional view of another embodiment of the handle cap.

[0049] Fig. 20 It is a three-dimensional diagram of the electrostatic current transfer structure in the shell.

[0050] Fig.21 for Fig. 20 Magnified view of the middle H region.

[0051] Fig. 22 This is an exploded view of the manual operating mechanism.

[0052] Fig.23 for Fig. 22 A three-dimensional view of the manual drive gear.

[0053] Description of reference numerals:

[0054] 1. First cover body; 2. Second cover body; 3. Circuit board; 4. Anti-static climbing board; 5. First mounting hole; 6. Plug hole; 7. Second mounting hole; 8. Plug column; 9. Indicator light hole; 10. Hollow guide column; 11. Reinforcement rib; 12. Handle; 13. Fixing plate; 14. Connecting shaft; 15. Connecting rod; 16. Driven gear; 17. Extension end; 18. Annular flange; 19. Handle body; 20. Handle cap; 21. First connecting hole; 22. Annular groove; 23. Barrier; 24. Second connecting hole; 25. Side opening; 26. Metal bracket; 27. Electrostatic release line; 28. Wire limit hook; 29. ​​Manual drive rod; 30. Manual drive gear; 31. One-way tooth; 32. Manual-automatic switching device; 33. Embedded nut; 34. Rocker arm. DETAILED DESCRIPTION

[0055] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] Example 1

[0060] This embodiment provides a specific implementation of an anti-static structure of a reclosing circuit breaker, such as Figure 1As shown, the housing of the reclosing circuit breaker includes a first cover body 1 and a second cover body 2 that cooperate with each other, and an antistatic structure is arranged between the first cover body 1 and the second cover body 2.

[0061] like Figure 2 As shown, a circuit board 3 is arranged in the first cover body 1 of the shell, and the circuit board 3 is used for circuit control. The anti-static structure includes: an anti-static climbing plate 4, the anti-static climbing plate 4 is arranged on the upper surface of the first cover body 1, and the top of the anti-static climbing plate 4 extends upward from the first cover body 1. When the first cover body 1 and the second cover body 2 are buckled, the anti-static climbing plate 4 extends into the second cover body 2. Since the reclosing circuit breaker with this anti-static structure is generally small in size and the circuit board 3 is densely arranged, the setting of the anti-static climbing plate 4 can increase the creepage distance between the fitting surfaces of the first cover body 1 and the second cover body 2, and improve the electrostatic performance of the reclosing circuit breaker product.

[0062] like Figure 3 As shown, a sunken insertion hole 6 is provided on the first cover body 1, the top surface of the insertion hole is lower than the matching surface of the first cover body and the second cover body, and a first mounting hole 5 is provided in the insertion hole, and the first mounting hole has an internal thread.

[0063] like Figure 4 , Figure 5 As shown, a plug post 8 is provided on the second cover body 2 , and the plug post 8 extends from the second cover body 2 , and a through second mounting hole is provided in the plug post 8 .

[0064] like Fig. 9 As shown, when the first cover body 1 and the second cover body 2 are covered, the pin 8 of the second cover body 2 extends into the socket 6 of the first cover body 1, and the mating surfaces of the pin 8 and the socket 6 form a height difference with the mating surfaces of the first cover body 1 and the second cover body 2, thereby increasing the electrostatic creepage distance.

[0065] As an alternative implementation, the first cover body is provided with a plug post, and the second cover body is provided with a plug hole.

[0066] like Figure 4 , Figure 6 As shown, a lamp is arranged on the circuit board, and corresponding to the lamp on the circuit board, a plurality of indicator light holes 9 are arranged on the second cover body 2, and the indicator light holes 9 are provided with a hollow guide column 10 extending toward the first cover plate, and the hollow guide column 10 extends toward the indicator light arranged on the first cover body 1, and is finally sleeved outside the indicator light after assembly, and a chamfer is arranged at one end of the hollow guide column 10 away from the second cover body 2; at the same time, a reinforcing rib 11 is arranged between the hollow guide column 10 and the second cover body 2.

[0067] like Figure 7 , Figure 8 , Fig. 9 As shown, when the first cover body 1 and the second cover body 2 are buckled together, the first mounting hole 5 and the second mounting hole 7 are arranged in a high and low offset matching arrangement relative to the mating surfaces of the first cover body 1 and the second cover body 2, so that the bolt fixing point of the first cover body 1 and the second cover body 2 increases the creepage distance, improves the electrostatic performance of the product, and allows the circuit board 3 to be set at a side edge position close to the second cover body 2.

[0068] like Figure 7 , Fig.10 , Fig.11 As shown, when the first cover body 1 and the second cover body 2 are buckled together, the anti-static climbing plate 4 extends into the inner wall of the second cover body 2, which can increase the static electricity creepage distance and improve the anti-static performance of the product. In addition, the second cover body 2 can be limited by the anti-static climbing plate 4, so that the first cover body 1 and the second cover body 2 fit more closely.

[0069] The anti-static structure is mainly used in reclosing circuit breakers. Many reclosing circuit breaker products are small in size and the circuit boards 3 are densely arranged. By setting the anti-static climbing board 4, the climbing distance can be increased and the electrostatic performance of the product can be improved.

[0070] Example 2

[0071] This embodiment provides a specific implementation of the transmission structure of a reclosing circuit breaker, such as Fig.12 As shown, a mounting groove is provided in the housing of the reclosing circuit breaker, and a handle 12 is rotatably mounted in the mounting groove. The handle 12 is connected to a driving device through a transmission structure. When reclosing is required, the driving device drives the handle to rotate in the housing of the reclosing circuit breaker through the transmission structure.

[0072] like Fig.12 , Fig. 20 As shown, in the housing of the reclosing circuit breaker, a manual operating mechanism and an automatic operating mechanism are respectively arranged on both sides of the driven gear 16; the manual operating mechanism and the automatic operating mechanism can drive the driven gear 16 to rotate, so as to realize the movement between the first position and the second position of the handle 12. Specifically, the automatic operating mechanism has an automatic driving gear meshing with the driven gear 16, and the automatic driving gear is connected to the driving of the driving motor. The manual operating mechanism has a manual driving gear 30, which is meshed with the driven gear 16, and the manual driving gear 30 is connected to the bottom end of the manual driving rod 29, and the manual driving rod 29 can drive the manual driving gear 30 to rotate, and the manual driving rod 29 is connected to the housing through the metal bracket 26.

[0073] like Fig.13As shown, the transmission structure includes: a fixed plate 13, a connecting shaft 14, a connecting rod 15 and a driven gear 16. The fixed plate 13 is connected to the top of the handle, and the fixed plate 13 has an extension end 17 extending toward one side of the handle; the connecting shaft 14 is connected to the extension end 17, and the extension end 17 is arranged so that the driving handle can avoid the interference member above the handle when rotating, so that the space layout in the housing is more compact.

[0074] like Fig.14 As shown, the handle has a first position rotated to a first end in the housing, at which time the reclosing circuit breaker is in an off state.

[0075] like Fig.16 As shown, the handle has a second position rotated to a second end in the housing, at which time the reclosing circuit breaker is in a closed state.

[0076] At the same time, when the handle is switched from the first position to the second position, the top surface of the handle is always lower than the lower surface of the driven gear; this can greatly reduce the size of the handle, making the overall structure more compact, reducing the overall volume of the reclosing switch, and saving costs.

[0077] like Fig.15 As shown, the fixing plate 13 connected to the top of the handle has an extension end 17 extending in a direction away from the first position of the handle, and the extension end 17 is vertically connected to the connecting shaft 14, and one end of the connecting rod 15 is connected to the connecting shaft 14. When the handle is rotated to the first position, the connecting shaft 14 vertically arranged at the upper end of the extension end 17 can avoid the interference member above the handle. Specifically, the handle can be extended to the bottom of the driven gear 16, making the spatial layout more compact.

[0078] like Fig.15 As shown, a circular hole is provided at one end of the connecting rod 15, which is connected to one end of a rocker arm 34, and the other end of the rocker arm is connected to a driven gear; the rocker arm 34 is a "Z"-shaped connecting rod; a waisted circular hole is provided at the other end of the connecting rod 15, which is connected to the connecting shaft 14.

[0079] like Fig.16 As shown, the connecting rod 15 is a "Z"-shaped connecting rod. Since there is a height difference between the driven gear 16 and the upper end of the connecting shaft 14, the connecting rod 15 is set to be in a "Z" shape, so that the connecting rod 15 can be reliably assembled when the handle is in the first position and the second position.

[0080] like Fig.17As shown, a through hole is provided on the extension end 17 of the fixing plate 13, one end of the connecting shaft 14 passes through the through hole, and an annular flange 18 is provided on the connecting shaft 14, and the lower end of the annular flange 18 abuts against the extension end 17; the connection method of the connecting shaft 14 and the extension end 17 can be riveted or welded, which can increase the firmness of the connection between the connecting shaft 14 and the extension end 17. At the same time, the setting of the extension end 17 realizes the eccentric connection between the connecting shaft 14 and the handle, avoiding the contact between the connecting shaft and the rear gear.

[0081] like Fig.17 As shown, the upper end of the connecting shaft 14 passes through the oval hole of the connecting rod 15, and a threaded hole is provided at the upper top of the connecting shaft 14, and the upper end of the annular flange 18 abuts against the lower end of the connecting rod 15; a nut is screwed into the threaded hole of the connecting shaft 14, and the blocking of the nut prevents the connecting shaft 14 from passing through the oval hole of the connecting rod 15, so that a sliding circular motion is performed between the connecting shaft 14 and the connecting rod 15.

[0082] like Fig.18 As shown, the handle includes a handle body 19 and a handle cap 20, the handle cap 20 is sleeved on the upper end of the handle body 19, and has a first connecting hole 21 in the middle of the handle cap 20, and the upper end of the first connecting hole 21 has a circular groove 22; the first bolt passes through the first connecting hole 21 to fasten the handle cap 20 and the handle body 19, the nut of the first bolt can be completely screwed into the first connecting hole 21, after the first bolt is completely screwed into the first connecting hole 21, a barrier 23 is sealed and arranged in the circular groove 22 above the first connecting hole 21, the barrier 23 can be selected as an insulating material such as red steel cardboard, so as to increase the electrostatic protection of the handle body 19, increase the creepage distance, enhance the insulation withstand voltage, and also play a role in that when the screws between the handle body and the handle cap are loose, the barrier is used to resist (the fixing plate resists the barrier, and the barrier resists the screw) to prevent the screw from falling off completely and causing the connection between the two to be destroyed.

[0083] like Fig.19 As shown, a second connecting hole 24 is provided at the top of the handle cap 20, and an embedded nut 33 is embedded in each of the second connecting holes 24. Specifically, the embedded nut 33 can be embedded into the second connecting hole 24 from the side opening 25 of the handle cap 20, and can also be embedded into the second connecting hole 24 from above the second connecting hole 24; two through holes are provided on the fixing plate 13, and bolts are passed through the through holes and screwed with the embedded nuts 33 to achieve connection between the handle cap 20 and the fixing plate 13; the setting method of the embedded nut 33 can not only achieve the fixation of the handle cap 20 and the fixing plate 13, but also enhance the bearing capacity of the handle cap 20.

[0084] Example 3

[0085] This embodiment provides a specific implementation of the electrostatic current transfer structure of a reclosing circuit breaker, such as Fig.18 As shown, the housing of the reclosing circuit breaker has a circuit board 3, a manual operating mechanism and a manual-automatic switching device 32 inside, wherein the circuit board 3 is connected to a protective ground wire, the manual operating mechanism has a metal bracket 26 arranged in the housing, and the manual-automatic switching device 32 is arranged in parallel with the metal bracket 26 of the manual operating mechanism in the housing, and is electrically connected to the circuit board 3 through a signal line.

[0086] The electrostatic current transfer structure includes: an electrostatic release line 27 arranged between the metal bracket 26 of the manual operating mechanism and the protective ground line.

[0087] like Fig.19 As shown, inside the shell, there is a wire guiding channel between the manual-automatic switching device 32 and the circuit controller board, and the signal line between the manual-automatic switching device 32 and the circuit board 3 is accommodated in the wire guiding channel; one end of the electrostatic release line 27 is connected to the metal bracket 26 of the manual operating mechanism, and the other end of the electrostatic release line 27 is connected to the protective ground line, and the electrostatic release line 27 is also accommodated in the wire guiding channel.

[0088] like Fig.19 As shown, the wire guiding channel is provided with a wire limiting hook 28, and the wire limiting hook 28 has two wire limiting hooks 28 arranged at intervals, and the inlet and outlet directions of the two wire limiting hooks 28 are opposite.

[0089] like Fig. 20 As shown, the manual operating mechanism includes: a metal bracket 26, a manual drive rod 29 and a manual drive gear 30. The metal bracket 26 is used to be connected in the housing, the manual drive rod 29 is rotatably connected to the metal bracket 26, one end of the manual drive rod 29 passes through the metal bracket 26, and the other end is suitable for driving operation, and the manual drive rod 29 is suitable for crossing the limit rod. The manual drive gear 30 is connected to the bottom end of the manual drive rod 29, and is suitable for being driven to rotate by the manual drive rod 29.

[0090] like Fig.21 As shown, the center of the manual drive gear 30 has a one-way tooth 31 for cooperating with the limiting rod.

[0091] like Fig. 22 , Fig.23 As shown, the manual drive rod 29 is suitable for crossing two limit rods, wherein the limit rod at the lower end is used to cooperate with the one-way tooth 31 of the manual drive gear 30, and the limit rod at the upper end is used to cooperate with the metal bracket 26, so that the manual drive rod 29 cannot be pulled out of the metal bracket 26.

[0092] The housing of the reclosing circuit breaker provided in this embodiment adopts the housing described in the first embodiment, that is, it includes a first cover body 1 and a second cover body 2 that cooperate with each other, and also includes an anti-static climbing plate 4 and other structures, so as to further ensure the anti-static nature of the housing of the reclosing circuit breaker.

[0093] The housing of the reclosing circuit breaker provided in this embodiment also has the transmission mechanism described in the second embodiment. Since the connecting rod 15 of the transmission structure is in an operating state, the use of the above-mentioned electrostatic current transfer structure does not affect the movement of the connecting rod 15.

[0094] Example 4

[0095] This embodiment provides a reclosing circuit breaker, including the electrostatic current transfer structure, anti-static structure and transmission mechanism described in embodiments 1-3.

[0096] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A transmission structure, It is characterized in that include: A fixing plate (13) connected to a handle (12) for being driven, the handle (12) being rotatably connected in the housing, the handle having a first position in the housing where it is rotated to a first end, and a second position in the housing where it is rotated to a second end; the fixing plate (13) having an extension end (17) extending from a top end of the handle in a direction away from the first position; A connecting shaft (14) vertically connected to the extended end (17) of the fixing plate (13); A connecting rod (15), one end of which is connected to the connecting shaft (14), and the other end of which is suitable for being connected to the driving device; The connecting shaft (14) and the handle are eccentrically arranged to form an escape space for the driven gear (16); when the handle moves between the first position and the second position, the moving arc trajectory of the handle is always lower than the driven gear (16) to avoid contact between the connecting shaft and the driven gear (16).

2. The transmission structure according to claim 1, It is characterized in that The connecting rod (15) is a "Z"-shaped connecting rod; and a waist-shaped hole is provided at one end of the connecting rod (15) close to the handle.

3. The transmission structure according to claim 1 or 2, It is characterized in that The handle comprises a handle body (19) and a handle cap (20) sleeved on the upper end of the handle body (19); a first mounting hole is provided on the top end of the handle cap (20); a first fastener passes through the first mounting hole and is fixed to the handle body (19); a fixing plate (13) is fixed to the top of the handle cap (20); a blocking member (23) is provided between the fixing plate (13) and the first fastener.

4. The transmission structure according to claim 3, It is characterized in that The barrier (23) is a red steel cardboard or glue layer structure.

5. The transmission structure according to claim 1 or 2, It is characterized in that The handle comprises a handle body (19) and a handle cap (20) sleeved on the upper end of the handle body (19), wherein a connecting piece is embedded in the handle cap (20); and the fixing plate (13) is fixed to the connecting piece by a second fastener.

6. The transmission structure according to claim 1 or 2, It is characterized in that The driving device is connected to the connecting rod (15) via a driven gear (16); the driving device comprises a manual operating mechanism and an automatic operating mechanism.

7. The transmission structure according to claim 6, It is characterized in that When the handle is switched from the first position to the second position, the top surface of the handle is always lower than the bottom surface of the driven gear (16).

8. The transmission structure according to claim 7, It is characterized in that One end of the connecting rod (15) is connected to a driven gear via a rocker arm; the driven gear is a "Z"-shaped connecting rod.

9. The transmission structure according to claim 6, It is characterized in that The manual operating mechanism comprises: A metal bracket (26) connected inside the housing; A manual driving rod (29) rotatably connected to the metal bracket (26); one end of the manual driving rod (29) passes through the metal bracket (26), and the other end is suitable for driving operation; A manual drive gear (30) is connected to the bottom end of the manual drive rod (29) and is suitable for being driven to rotate by the manual drive rod (29); the manual drive gear (30) is meshed with the driven gear (16); a limit rod crosses the manual drive rod; and the center of the manual drive gear (30) has a one-way tooth (31) structure for cooperating with the limit rod.

10. The transmission structure according to claim 6, It is characterized in that The automatic operating mechanism comprises: An automatic driving gear, one end of which is meshed with a driven gear (16); The driving motor has a driving end connected to the automatic driving gear.

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