Rotary positioning mechanism

Abstract

The utility model relates to the technical field of electric appliance control positioning mechanisms, in particular to a rotary positioning mechanism which comprises a shaft sleeve and a stop seat, a shaft hole is formed in the central axis of the shaft sleeve in a penetrating mode, and the stop seat and the shaft sleeve are coaxially arranged. A rotating positioning cavity is further formed in the shaft sleeve, the stop base is rotationally arranged in the rotating positioning cavity, positioning pieces which are matched with the inner wall of the rotating positioning cavity in a sliding and abutting mode are movably arranged on the two sides of the stop base, and a plurality of positioning pits which are matched with the positioning pieces for limiting are formed in the two sides of the inner wall of the rotating positioning cavity at equal intervals respectively. Positioning elastic pieces are further arranged on the two sides in the stop base and movably abut against the positioning pieces. The double-shaft encoder output mechanism is compact in structure, under the action of the positioning elastic piece, the pushing positioning piece is always kept to abut against the inner wall of the rotating positioning cavity in a sliding mode, a better positioning effect can be achieved, the structural reliability and stability are improved, and the reliability of output signals of the double-shaft encoder output mechanism is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliance control unit positioning mechanisms, in particular to a rotary positioning mechanism. Background Art

[0002] Potentiometers and encoders are mainly used in various electronic products, especially in communication equipment. Since many devices need to use potentiometers and encoders at the same time, dual-axis encoders that integrate potentiometers and encoders have appeared in the prior art. The current dual-axis encoders are all equipped with positioning mechanisms, but the positioning mechanisms currently used in dual-axis encoders are easily damaged during long-term use and have a short service life. In addition, there is a loose situation that leads to poor positioning effect. Summary of the invention

[0003] In view of the problems of the prior art, the utility model provides a rotary positioning mechanism with a compact structure. Under the action of the rotary positioning mechanism, the outer shaft core can be rotated to control the output mechanism of the dual-axis encoder to switch the position. The outer shaft core drives the stop seat to rotate, and the positioning member is driven to move synchronously. Under the action of the positioning spring sheet, the positioning member is always pushed to slide against the inner wall of the rotary positioning cavity. When the positioning member slides into the positioning pit, the positioning effect is achieved. At the same time, the positioning spring sheet keeps pushing the positioning member, so that the force with which the positioning member slides into the positioning pit is increased. On the one hand, a louder positioning sound can be produced, and on the other hand, a better positioning effect can be achieved, thereby improving the structural reliability and stability, and ensuring the reliability of the output signal of the output mechanism of the dual-axis encoder.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model provides a rotary positioning mechanism, which includes a shaft sleeve and a stop seat, wherein an axial hole is penetrated on the central axis of the shaft sleeve, and the stop seat is coaxially arranged with the shaft sleeve; a rotary positioning cavity is also arranged in the shaft sleeve, and the stop seat is rotatably arranged in the rotary positioning cavity, and positioning members that cooperate and slide with the inner wall of the rotary positioning cavity are movably arranged on both sides of the stop seat, and a plurality of positioning pits that cooperate and limit the positioning members are equidistantly arranged on both sides of the inner wall of the rotary positioning cavity, and positioning spring sheets are also arranged on both sides of the stop seat, and the positioning spring sheets movably abut against the positioning members.

[0006] Wherein, a through hole is arranged in the middle of the stop seat, and the through hole is arranged corresponding to the shaft hole.

[0007] Among them, cavities are respectively provided on both sides of the stop seat, and the cavities correspond to the positioning spring sheets one by one. The positioning spring sheets are accommodated in the cavities, and openings are provided on both sides of the outer wall of the stop seat. The positioning piece is movably provided at the openings, and the openings are connected with the cavity. One end of the positioning spring sheet is movably abutted against the positioning piece, and the other end of the positioning spring sheet is connected to the inner wall of the cavity.

[0008] Among them, a hook portion is provided at the other end of the positioning spring sheet, and a hook groove is provided at the end of the cavity away from the opening, and the hook portion is buckled in the hook groove; an avoidance groove for the movement of one end of the positioning spring sheet is extended at the end of the cavity close to the opening, and the hook groove and the avoidance groove are respectively connected to the cavity.

[0009] Wherein, an arc-shaped limiting groove is arranged on the outer edge of the upper end surface of the stop seat, and a limiting block is arranged in the rotation positioning cavity, and the limiting block is slidably arranged in the arc-shaped limiting groove.

[0010] Preferably, the positioning member is a steel ball.

[0011] Preferably, the positioning member is a steel column.

[0012] Beneficial effects of the utility model:

[0013] The utility model has a compact structure. Under the action of the rotary positioning mechanism, it can make the outer shaft core rotate to control the output mechanism of the dual-axis encoder to switch the position. The stop seat is driven to rotate through the outer shaft core, and the positioning piece is driven to move synchronously. Under the action of the positioning spring sheet, the positioning piece is always pushed to slide against the inner wall of the rotary positioning cavity. When the positioning piece slides into the positioning pit, the positioning effect is achieved. At the same time, because the positioning spring sheet keeps pushing the positioning piece, the force with which the positioning piece slides into the positioning pit is increased, which can produce a louder positioning sound and achieve a better positioning effect, thereby improving the structural reliability and stability, and ensuring the reliability of the output signal of the output mechanism of the dual-axis encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model in cooperation with the outer shaft core and the inner shaft core.

[0015] Figure 2 It is a structural schematic diagram of the shaft sleeve of the utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the utility model after the shaft sleeve is hidden.

[0017] Figure 4 It is a structural schematic diagram of the stop seat of the utility model.

[0018] Figure 5 This is a schematic structural diagram of the stop seat of the utility model from another viewing angle.

[0019] exist Figures 1 to 5 Reference numerals in the drawings include:

[0020] 100, outer shaft core; 200, inner shaft core;

[0021] 1. Bushing; 2. Stop seat; 3. Shaft hole; 4. Rotation positioning cavity; 5. Positioning piece; 6. Positioning pit; 7. Positioning spring; 8. Through hole; 9. Receiving cavity; 10. Opening; 11. Hooking part; 12. Hooking groove; 13. Avoiding groove; 14. Arc-shaped limiting groove; 15. Limiting block. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0023] A rotary positioning mechanism, such as Figures 1 to 5 As shown, it includes a sleeve 1 and a stop seat 2, an axial hole 3 is provided on the central axis of the sleeve 1, and the stop seat 2 is coaxially arranged with the sleeve 1; a rotation positioning cavity 4 is also provided in the sleeve 1, and the stop seat 2 is rotatably provided in the rotation positioning cavity 4, and positioning members 5 that slide and abut with the inner wall of the rotation positioning cavity 4 are movably provided on both sides of the stop seat 2, and a plurality of positioning pits 6 that cooperate with the positioning member 5 are provided at equal intervals on both sides of the inner wall of the rotation positioning cavity 4, and positioning springs 7 are also provided on both sides of the stop seat 2, and the positioning springs 7 are movably abutted with the positioning member 5. Specifically, preferably, the positioning member 5 is a steel ball or a steel column. Among them, a through hole 8 is provided in the middle of the stop seat 2, and the through hole 8 is provided corresponding to the axial hole 3, and the through hole 8 is convenient for the inner shaft core 200 of the dual-axis encoder to pass through. Specifically, during assembly and use, the outer shaft core 100 extends into the axial hole 3 of the shaft sleeve 1 and is connected to the stop seat 2 to conveniently drive the stop seat 2 to rotate; the utility model has a compact structure. Under the action of the rotary positioning mechanism, it can make the outer shaft core 100 rotate to control the output mechanism of the dual-axis encoder to switch the position. The stop seat 2 is driven to rotate through the outer shaft core 100, and the positioning member 5 is driven to move synchronously. Under the action of the positioning spring piece 7, the positioning member 5 is always pushed to slide against the inner wall of the rotary positioning cavity 4. When the positioning member 5 slides into the positioning pit 6, the positioning effect is achieved. At the same time, because the positioning spring piece 7 keeps pushing the positioning member 5, the force with which the positioning member 5 slides into the positioning pit 6 is increased, which can not only produce a louder positioning sound, but also achieve a better positioning effect, improve the structural reliability and stability, and ensure the reliability of the output signal of the output mechanism of the dual-axis encoder.

[0024] In the embodiment of the present application, cavities 9 are respectively provided on both sides of the stop seat 2, and the cavities 9 correspond to the positioning springs 7 one by one. The positioning springs 7 are accommodated in the cavities 9, and openings 10 are provided on both sides of the outer wall of the stop seat 2. The positioning member 5 is movably provided at the openings 10, and the openings 10 are communicated with the cavities 9. One end of the positioning spring 7 is movably abutted against the positioning member 5, and the other end of the positioning spring 7 is connected to the inner wall of the cavities 9. Specifically, under the above-mentioned setting, the positioning spring 7 is accommodated in the above-mentioned cavities 9, and the positioning member 5 is movably provided at the openings 10. Under the elastic force of the positioning spring 7, the positioning member 5 is kept pushed to slide against the inner wall of the rotating positioning cavity 4; wherein, the positioning member 5 and the positioning spring 7 are arranged on both sides of the stop seat 2, so as to ensure that the stop seat 2 can be positioned on both sides thereof.

[0025] In the embodiment of the present application, the other end of the positioning spring piece 7 is provided with a hook portion 11, and the end of the cavity 9 away from the opening 10 is provided with a hook groove 12, and the hook portion 11 is buckled in the hook groove 12; the end of the cavity 9 close to the opening 10 is extended with an avoidance groove 13 for one end of the positioning spring piece 7 to move, and the hook groove 12 and the avoidance groove 13 are respectively connected to the cavity 9. Specifically, under the above-mentioned setting, the positioning spring piece 7 can be positioned and installed by buckling the hook portion 11 in the hook groove 12 to prevent the positioning spring piece 7 from loosening; wherein, the avoidance groove 13 can provide a movable space, so that when the positioning member 5 is retracted from the opening 10 into the cavity 9, the avoidance groove 13 facilitates one end of the positioning spring piece 7 to move therein to make way, thereby ensuring the stability and reliability of the work.

[0026] In the embodiment of the present application, an arc-shaped limit groove 14 is provided on the outer edge of the upper end surface of the stop seat 2, and a limit block 15 is provided in the rotation positioning cavity 4, and the limit block 15 is slidably arranged in the arc-shaped limit groove 14. Specifically, under the above arrangement, it is convenient to limit the rotation range of the outer stop seat 2 by means of structural limit, thereby improving working reliability and stability.

[0027] In the embodiment of the present application, the stop seat 2 and the sleeve 1 are both made of stainless steel powder metallurgy, with high structural strength, strong wear resistance, convenient long-term use, long service life, not easy to damage, and reduced replacement and maintenance costs.

[0028] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A rotary positioning mechanism, characterized in that: It includes a shaft sleeve and a stop seat, an axial hole is penetrated on the central axis of the shaft sleeve, and the stop seat is coaxially arranged with the shaft sleeve; a rotation positioning cavity is also provided in the shaft sleeve, and the stop seat is rotatably provided in the rotation positioning cavity, and positioning members that cooperate and slide with the inner wall of the rotation positioning cavity are movably provided on both sides of the stop seat, and a plurality of positioning pits that cooperate and limit the positioning members are evenly spaced on both sides of the inner wall of the rotation positioning cavity, and positioning spring sheets are also provided on both sides of the stop seat, and the positioning spring sheets movably abut against the positioning members.

2. A rotary positioning mechanism according to claim 1, characterized in that: A through hole is arranged in the middle of the stop seat, and the through hole is arranged corresponding to the shaft hole.

3. A rotary positioning mechanism according to claim 1, characterized in that: Cavities are also provided on both sides of the stop seat, respectively, and the cavities correspond to the positioning spring sheets one by one. The positioning spring sheets are accommodated in the cavities, and openings are provided on both sides of the outer wall of the stop seat. The positioning piece is movably provided at the openings, and the opening is communicated with the cavity. One end of the positioning spring sheet is movably abutted against the positioning piece, and the other end of the positioning spring sheet is connected to the inner wall of the cavity.

4. A rotary positioning mechanism according to claim 3, characterized in that: A hook portion is provided at the other end of the positioning spring sheet, and a hook groove is provided at the end of the cavity away from the opening, and the hook portion is buckled in the hook groove; an avoidance groove for the movement of one end of the positioning spring sheet is extended at the end of the cavity close to the opening, and the hook groove and the avoidance groove are respectively connected to the cavity.

5. A rotary positioning mechanism according to claim 1, characterized in that: An arc-shaped limiting groove is arranged on the outer edge of the upper end surface of the stop seat, and a limiting block is arranged in the rotation positioning cavity, and the limiting block is slidably arranged in the arc-shaped limiting groove.

6. A rotary positioning mechanism according to any one of claims 1 to 5, characterized in that: The positioning piece is a steel ball.

7. A rotary positioning mechanism according to any one of claims 1 to 5, characterized in that: The positioning member is a steel column.

Images