Hand wheel locking structure

Abstract

The hand wheel locking structure comprises an outer shell and a bottom shell which are fixedly connected, and a mounting boss is arranged in the middle of the inner side of the outer shell; a rotating rod is fixed on the mounting boss; a locking gear ring is fixed on the inner side of the shell; a fixed main body is matched outside the rotating rod; the fixed main body is sleeved with a locking main body and a rotation stopping sheet; one end of the locking main body extends out of the bottom shell and is fixed with a locking knob; one side, far away from the bottom shell, of the locking main body is provided with at least one wedge-shaped boss; the rotation stopping sheet is arranged above the locking main body; a locking elastic piece corresponding to the wedge-shaped boss is fixed to the rotation stopping piece. And the end part of the locking elastic sheet can be bounced to be clamped into the tooth root of the locking tooth ring. The production efficiency can be improved, the assembly precision can be improved, the production difficulty can be reduced, the product consistency can be improved, the part machining difficulty can be reduced, the part assembly types can be reduced, and the product BOM cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a handwheel locking structure of an electronic endoscope. Background Art

[0002] CN209122180U discloses a locking hand wheel of an endoscope operating part, which includes a central axis fixedly arranged relative to a rear shell, a large wheel rotating cylinder is rotated on the outer surface of the central axis, and the bottom of the large wheel rotating cylinder extends into the rear shell, which can drive the large sprocket in the rear shell to rotate. When the large sprocket rotates in different directions, it can drive the steel wire to extend and retract in different directions, and control the endoscope to swing in different directions. A large wheel top cover is fixedly connected to the large wheel rotating cylinder, and the large wheel top cover can rotate relative to the central axis. The large wheel top cover is fixedly connected to the large wheel bottom cover, and the large wheel top cover and the large wheel bottom cover are fixed by threaded connection. The large wheel top cover is a cylindrical tube structure with an opening downward, and an internal thread is arranged on the inner wall, and an external thread is arranged on the outer wall of the large bottom cover correspondingly. The large wheel top cover and the large wheel bottom cover can be rotated relative to each other to achieve tightening and fixing, and are fixedly connected by applying glue. The large wheel top cover and the large wheel bottom cover are connected to each other to form a cavity structure, and multiple components are installed inside the two.

[0003] A gear ring disk is arranged to rotate relative to the outer circumference of the large wheel rotating drum. The large wheel rotating drum can rotate relative to the gear ring disk, and tooth blocks for meshing are arranged on the side walls of the gear ring disk; it also includes an arc plate arranged stationary relative to the circumference of the rear shell, and an arc spring sheet is arranged on the arc plate. When the arc spring sheet undergoes elastic deformation, it can be stuck to the tooth block on the gear ring disk, or separated from the gear ring disk.

[0004] Although the locking handwheel of this structure can realize the function, it is difficult to assemble, so the consistency of the product is poor and the production efficiency is low. Summary of the invention

[0005] In view of the above-mentioned defects in the prior art, the present invention discloses a hand wheel locking structure with a simple assembly method.

[0006] To achieve the above-mentioned purpose, the present invention provides a handwheel locking structure, comprising a housing and a bottom housing that are fixedly connected, a mounting boss is provided at the middle of the inner side of the housing; a rotating rod is fixed on the mounting boss; a locking gear ring is fixed on the inner side of the housing;

[0007] Preferably, the rotating rod is provided with a fixed body; the fixed body is provided with a locking body and a rotation-stopping plate; one end of the locking body extends out of the bottom shell and is fixed to the locking knob; at least one wedge-shaped boss is provided on the side of the locking body away from the bottom shell;

[0008] Preferably, the anti-rotation plate is arranged above the locking body; a locking spring piece corresponding to the wedge-shaped boss is fixed on the anti-rotation plate; the end of the locking spring piece can be bounced up and stuck into the tooth root of the locking gear ring.

[0009] Preferably, the locking gear ring is provided with a fixing portion extending downward along the outer shell contour; the lower thread of the outer shell is matched with a clamping ring; and one end face of the clamping ring can abut against the end face of the fixing portion.

[0010] Preferably, the clamping ring includes a first clamping ring and a second clamping ring; the upper end surface of the first clamping ring can abut against the end surface of the fixing portion; the upper end surface of the second clamping ring can abut against the lower end surface of the first clamping ring.

[0011] Preferably, a first friction plate is provided between the locking gear ring and the housing.

[0012] Preferably, a second friction plate is mounted on the rotating rod; the second friction plate is located between the mounting portion of the rotating rod and the housing and the anti-rotation plate.

[0013] Preferably, a third friction plate is provided between the bottom shell and the locking body.

[0014] Preferably, a fourth friction plate is provided between the locking knob and the bottom shell.

[0015] Preferably, a first anti-rotation flattening position is arranged on the circumference of the end of the fixed body; and a second anti-rotation flattening position corresponding to the first anti-rotation flattening position is arranged in the inner hole of the anti-rotation plate.

[0016] Preferably, a first sealing ring is provided between the outer shell and the bottom shell.

[0017] Preferably, a second sealing ring is provided between the locking body and the bottom shell.

[0018] The beneficial effects of the present invention are as follows: the present invention can improve production efficiency, improve assembly accuracy, reduce production difficulty and improve product consistency, and can reduce the difficulty of parts processing, reduce the types of parts assembly, and reduce product BOM costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic assembly diagram of a specific embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of a specific embodiment of the present invention;

[0021] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0022] Figure 4 yes Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0023] Figure 5 It is a schematic diagram of the cooperation between the locking body and the anti-rotation plate in a specific embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the cooperation between the fixed body and the anti-rotation piece in a specific embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of assembling the housing and the first friction plate in a specific embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the assembly of the rotating rod and the housing in a specific embodiment of the present invention;

[0027] Fig. 9 is a schematic diagram of the assembly of the second friction plate and the rotating rod in a specific embodiment of the present invention;

[0028] Fig.10 It is a schematic diagram of the assembly of the anti-rotation plate and the locking spring sheet in a specific embodiment of the present invention;

[0029] Fig.11 It is a schematic diagram of the assembly of the locking gear ring and the housing in a specific embodiment of the present invention;

[0030] Fig.12 is a front view of the locking gear ring and the housing after being assembled in one specific embodiment of the present invention;

[0031] Fig.13 yes Fig.12 Schematic diagram of the cross-sectional structure of EE;

[0032] Fig.14 It is a schematic diagram of the assembly of the locking body and the bottom shell in a specific embodiment of the present invention;

[0033] Fig.15 It is a bottom schematic diagram of the locking body and the bottom shell after being assembled in a specific embodiment of the present invention;

[0034] Fig.16 It is a schematic diagram of the assembly of a locking body and a locking knob in a specific embodiment of the present invention;

[0035] Fig.17 It is a schematic diagram of the assembly of the locking body and the anti-rotation plate in a specific embodiment of the present invention;

[0036] Fig.18 It is a schematic diagram of the assembly of a housing, a rotating rod and a locking body in a specific embodiment of the present invention;

[0037] Fig.19 is a bottom schematic diagram of a housing, a rotating rod and a locking body after being assembled in a specific embodiment of the present invention;

[0038] Fig. 20 It is a structural schematic diagram of a fixed body in a specific implementation manner of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which 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 manner, and therefore cannot be understood as limiting the present invention. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] like Figure 1-5 As shown, a hand wheel locking structure comprises a housing 1 and a bottom housing 5 which are fixedly connected, and a rotating hand wheel 17 is fixedly connected to the housing 1.

[0041] A mounting boss 1a is provided in the middle of the inner side of the outer shell 1, and a rotating rod 3 is fixed on the mounting boss 1a. The rotating rod 3 is rotated externally with a fixed body 9, and the fixed body 9 is hollow cylindrical. A locking gear ring 10 is fixed on the inner side of the outer shell 1. The finer the teeth on the locking gear ring 10, the higher the locking accuracy.

[0042] The fixing body 9 is provided with a locking body 6 and a stopper 7. The stopper 7 is arranged above the locking body 6. The locking body 6 extends out of the bottom shell 5 and is fixed to the locking knob 11. A wedge-shaped boss 6a is arranged on the side of the locking body 6 away from the bottom shell 5. The side wall of the wedge-shaped boss 6a can abut against the side wall of the stopper 7. A locking spring 8 corresponding to the wedge-shaped boss 6a is fixed on the stopper 7. The end of the locking spring 8 can be bounced up and inserted into the root of the locking gear ring 10. One wedge-shaped boss 6a and one locking spring 8 form a group. At least one group is required to achieve the purpose of locking in the present invention. In this embodiment, 4 groups are set, and other numbers can be set in other embodiments. When in use, rotating the locking knob 11 can drive the locking body 6 to rotate synchronously. The wedge-shaped boss 6a arranged on the locking body 6 pushes the stopper 7 to rotate synchronously. At the same time, the wedge-shaped boss 6a can push the end of the locking spring 8 to bounce upward and insert into the root of the locking gear ring 10, thereby completing the locking.

[0043] like Figure 4As shown, the locking gear ring 10 is provided with a fixing portion 10a extending downward along the contour of the outer shell 1, and the lower thread of the outer shell 1 is matched with a clamping ring, and the clamping ring includes a first clamping ring 12a and a second clamping ring 12b. The first clamping ring 12a and the second clamping ring 12b can move up and down along the lower part of the outer shell 1 through threads, and the upper end face of the first clamping ring 12a can abut against the end face of the fixing portion 10a, and the upper end face of the second clamping ring 12b can abut against the lower end face of the first clamping ring 12a. After the handwheel is locked, it is not locked and cannot move, but is just locked. When in use, the tightness can be adjusted by the first clamping ring 12a and the second clamping ring 12b. Rotating the first clamping ring 12a to move upward can push the fixed part 10a and the locking gear ring 10 to move upward synchronously. At this time, the distance between the anti-rotation plate 7 and the locking gear ring 10 increases. When the locking spring piece 8 is stuck in the locking gear ring 10, the handwheel is locked loosely. Conversely, when the first clamping ring 12a moves downward, the handwheel is locked tightly. The second clamping ring 12b is mainly designed to prevent the first clamping ring 12a from loosening.

[0044] like Figure 4 , 7 As shown, a first friction plate 2 is arranged between the locking gear ring 10 and the outer shell 1. The first friction plate 2 is a plastic with a very small friction coefficient, such as PCM, Teflon, etc. One end face of the first friction plate 2 is fixedly connected to the outer shell 1. The connection method can be injection molding, bonding, clamping, etc. After the first friction plate 2 is fixedly connected to the outer shell 1, the locking gear ring 10 and the first friction plate 2 can move relative to each other, and the first friction plate 2 and the outer shell 1 will not move relative to each other.

[0045] like Figure 4 As shown, a second friction plate 4 is mounted on the rotating rod 3, and the second friction plate 4 is in a circular shape and is located between the mounting portion of the rotating rod 3 and the shell and the anti-rotation plate 7. A third friction plate 13 is arranged between the bottom shell 5 and the locking body 6, and a fourth friction plate 14 is arranged between the locking knob 11 and the bottom shell 5.

[0046] The first friction plate 2, the second friction plate 4, the third friction plate 13 and the fourth friction plate 14 are made of the same material, and are all made of plastic with a very small friction coefficient, such as PCM, Teflon, etc. The third friction plate 13 is provided to enable the bottom shell 5 and the locking body 6 to move relative to each other, thereby reducing the influence of the rotation of the locking body 6 on the bottom shell 5. The fourth friction plate 14 is provided to enable the bottom shell 5 and the locking knob 11 to move relative to each other, thereby reducing the influence of the rotation of the locking knob 11 on the bottom shell 5. The above-mentioned friction plates are all provided with convex rings to reduce friction, thereby making them smoother when rotating.

[0047] like Figure 6As shown, a first stop-rotation flattening position 9a is provided on the circumference of the end of the fixed body 9. In this embodiment, the stop-rotation flattening positions are set as four sides, and in other embodiments, at least one side can be set. The inner hole of the stop plate 7 is provided with a second stop-rotation flattening position 7a corresponding to the first stop-rotation flattening position 9a. The number of the second stop-rotation flattening positions 7a corresponds to the first stop-rotation flattening position 9a. In this embodiment, a four-side setting is also adopted. Through the cooperation of the first stop-rotation flattening position 9a and the second stop-rotation flattening position 7a, the fixed body 9 can be relatively fixed to the stop plate 7 and the locking spring plate 8 to prevent the stop plate 7 from rotating.

[0048] like Figure 4 As shown, a first sealing ring 15 is provided between the outer shell 1 and the bottom shell 5, and a second sealing ring 16 is provided between the locking body 6 and the bottom shell 5. The provision of the sealing rings improves the air tightness of the overall structure.

[0049] When in use, rotating the locking knob 11 drives the locking body 6 to rotate, and the wedge-shaped boss 6a arranged on the locking body 6 pushes the anti-rotation plate 7 to rotate. The anti-rotation plate 7 and the fixed body 9 are provided with anti-rotation flat positions. The rotation of the anti-rotation plate 7 drives the fixed body 9 to rotate synchronously, and vice versa. The anti-rotation plate 7 is provided with a locking spring piece 8 that extends into the tooth root of the locking gear ring 10 to achieve locking.

[0050] The locking hand wheel in the above embodiment can be assembled according to the following steps:

[0051] S1, such as Figure 7 As shown, the first friction plate 2 is fixedly connected to the housing 1;

[0052] S2, such as Figure 8 As shown, the rotating rod 3 is connected to the housing 1 by screws;

[0053] S3, such as Fig. 9 As shown, the second friction plate 4 is inserted into the rotating rod 3;

[0054] S4, such as Fig.10 As shown, the locking spring piece 8 and the anti-rotation piece 7 are fixed with screws;

[0055] S5, such as Figure 11-13 As shown, the locking gear ring 10 is placed into the housing 1 and fixed with a clamping ring;

[0056] S6, such as Figure 14-16 As shown, the locking body 6 is placed in the bottom shell 5, and then the locking knob 11 is connected to the locking body 6 by screws;

[0057] S7, such as Fig.17 As shown, the locking spring piece 8 and the anti-rotation piece 7 fixed in step S4 are assembled to the top of the locking body 6;

[0058] S8, such as Figure 18-19As shown, the parts assembled in step S7 are placed in the housing 1 and connected by screws;

[0059] S9, such as Fig. 20 As shown, place the entire hand wheel on the fixed body 9, so that the anti-rotation flat position on the anti-rotation plate 7 matches the anti-rotation flat position on the fixed body 9, and complete the installation. Figure 2 As shown, finally a rotating hand wheel 17 is installed outside the housing 1.

[0060] From the above steps, it can be seen that the installation of the present invention is quick and easy, the assembly precision is high, the labor intensity of personnel can be greatly reduced, and the corresponding installation steps of the present invention are simple and easy to use, which is convenient for promotion and can greatly improve the production speed.

[0061] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A hand wheel locking structure, comprising a housing (1) and a bottom housing (5) fixedly connected, characterized in that: A mounting boss (1a) is provided in the middle of the inner side of the housing (1); a rotating rod (3) is fixed on the mounting boss (1a); a locking gear ring (10) is fixed on the inner side of the housing (1); The rotating rod (3) is fitted with a fixed body (9) on the outside; a locking body (6) and a rotation-stopping plate (7) are mounted on the fixed body (9); one end of the locking body (6) extends out of the bottom shell (5) and is fixed to a locking knob (11); at least one wedge-shaped boss (6a) is provided on the side of the locking body (6) away from the bottom shell (5); The anti-rotation plate (7) is arranged above the locking body (6); a locking spring plate (8) corresponding to the wedge-shaped boss (6a) is fixed on the anti-rotation plate (7); the end of the locking spring plate (8) can be ejected and inserted into the tooth root of the locking gear ring (10).

2. The hand wheel locking structure according to claim 1, characterized in that: The locking gear ring (10) is provided with a fixing portion (10a) extending downwardly along the contour of the outer shell (1); the lower thread of the outer shell (1) is matched with a clamping ring; one end face of the clamping ring can abut against the end face of the fixing portion (10a).

3. The hand wheel locking structure according to claim 2, characterized in that: The clamping ring comprises a first clamping ring (12a) and a second clamping ring (12b); the upper end surface of the first clamping ring (12a) can abut against the end surface of the fixing portion (10a); and the upper end surface of the second clamping ring (12b) can abut against the lower end surface of the first clamping ring (12a).

4. The hand wheel locking structure according to claim 1, characterized in that: A first friction plate (2) is arranged between the locking gear ring (10) and the housing (1).

5. The hand wheel locking structure according to claim 1, characterized in that: The rotating rod (3) is sleeved with a second friction plate (4); the second friction plate (4) is located between the mounting portion of the rotating rod (3) and the housing and the anti-rotation plate (7).

6. The hand wheel locking structure according to claim 1, characterized in that: A third friction plate (13) is provided between the bottom shell (5) and the locking body (6).

7. The hand wheel locking structure according to claim 1, characterized in that: A fourth friction plate (14) is provided between the locking knob (11) and the bottom shell (5).

8. The hand wheel locking structure according to claim 1, characterized in that: A first anti-rotation flattening position (9a) is arranged on the circumference of the end of the fixed body (9); and a second anti-rotation flattening position (7a) corresponding to the first anti-rotation flattening position (9a) is arranged in the inner hole of the anti-rotation plate (7).

9. The hand wheel locking structure according to claim 1, characterized in that: A first sealing ring (15) is provided between the outer shell (1) and the bottom shell (5).

10. The hand wheel locking structure according to claim 1, characterized in that: A second sealing ring (16) is provided between the locking body (6) and the bottom shell (5).

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