Rotary encoder

Abstract

The embodiment of the utility model provides a rotary encoder. The rotary encoder comprises a rotating shaft, a first cover body, a turntable, a frame body, a circuit board and a second cover body, the rotating shaft penetrates through the first cover body and is rotationally connected with the first cover body; the first cover body, the frame body and the second cover body are arranged in sequence, the rotating disc is contained between the first cover body and the frame body and comprises an edge ring and a light chopper, the edge ring is clamped between the first cover body and the frame body in the axial direction of the rotating shaft, the rotating disc is coaxially connected with the rotating shaft so as to synchronously rotate along with the rotating shaft, and the circuit board is arranged between the frame body and the second cover body; the light chopper is arranged on the side, facing the circuit board, of the rotary disc and provided with a plurality of light shading portions and a plurality of light transmitting portions which are circumferentially and alternately distributed around the axis of the rotary shaft, the circuit board is provided with a light-emitting element and a light-sensitive element which are oppositely arranged, one of the light-emitting element and the light-sensitive element is arranged on the inner side of the light chopper, and the other one of the light-emitting element and the light-sensitive element is arranged on the outer side of the light chopper.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of encoder, and particularly relates to a rotary encoder. BACKGROUND

[0002] The rotary encoder is a sensor for detecting parameters such as angle, speed, displacement and acceleration, and the encoder can convert the parameters such as angle, speed, displacement and acceleration into an electric signal.

[0003] The rotary encoder generally comprises a rotating shaft, a light-reflecting turntable, a light-shielding seat, a light-emitting element and a light-sensitive element. The rotating shaft and the light-reflecting turntable are coaxially connected, the light-shielding seat is provided with an outgoing light transmission hole and a reflected light transmission hole, the light-reflecting turntable is arranged on one side of the light-shielding seat, and the light-emitting element and the light-sensitive element are arranged on the other side of the light-shielding seat. In the case that the light-reflecting surface on the light-reflecting turntable is opposite to the light-emitting element and the outgoing light transmission hole, the light emitted by the light-emitting element is sequentially transmitted through the outgoing light transmission hole, the light-reflecting surface and the reflected light transmission hole, and is shot to the light-sensitive element. In the case that the light-reflecting surface on the light-reflecting turntable is opposite to the light-emitting element and the outgoing light transmission hole, the light emitted by the light-emitting element is sequentially transmitted through the outgoing light transmission hole, the light-reflecting surface and the reflected light transmission hole, and is shot to the light-sensitive element. In the case that the light-reflecting turntable shields one of the outgoing light transmission hole and the reflected light transmission hole, the light emitted by the light-emitting element cannot be received by the light-sensitive element. In this way, the rotation condition of the rotating shaft can be judged through the signal received by the light-sensitive element.

[0004] From the above content, it can be known that in the related technology, the light emitted by the light-emitting element needs to be sequentially transmitted through the outgoing light transmission hole, the light-reflecting surface and the reflected light transmission hole, and is shot to the light-sensitive element. In this way, the light path between the light-emitting element and the light-sensitive element is too long, and the opening position precision of the outgoing light transmission hole and the reflected light transmission hole will affect the receiving effect of the light. UTILITY MODEL CONTENT

[0005] The embodiment of the present application provides a rotary encoder to solve the problem of how to simplify the light path between the light-emitting element and the light-sensitive element.

[0006] In order to solve the above technical problem, the present application is implemented as follows:

[0007] The rotating encoder provided by the embodiment of the present application comprises a rotating shaft, a first cover, a rotating disc, a frame, a circuit board and a second cover; the rotating shaft is arranged in the first cover and is rotationally connected with the first cover; the first cover, the frame and the second cover are sequentially arranged, the rotating disc is accommodated between the first cover and the frame, the rotating disc comprises an edge ring and a light shield, the edge ring is clamped between the first cover and the frame along the axial direction of the rotating shaft, the rotating disc is coaxially connected with the rotating shaft and rotates synchronously with the rotating shaft, and the circuit board is arranged between the frame and the second cover; the light shield is arranged on the side of the rotating disc facing the circuit board, the light shield is provided with a plurality of light shielding portions and a plurality of light transmitting portions which are alternately distributed in a circle around the axis of the rotating shaft, the circuit board is provided with a light emitting element and a light sensitive element which are oppositely arranged, one of the light emitting element and the light sensitive element is arranged on the inner side of the light shield, and the other is arranged on the outer side of the light shield, and the light shield is used for alternately shielding or transmitting the light emitted by the light emitting element towards the light sensitive element during the synchronous rotation with the rotating shaft.

[0008] Optionally, the light shield comprises a plurality of light shielding pieces which protrude towards the circuit board and are uniformly distributed in a circle around the axis of the rotating shaft, and the light shielding pieces form the light shielding portions, and the interval between two adjacent light shielding pieces forms a light transmitting portion.

[0009] Optionally, the rotating disc further comprises a base provided with an accommodating hole, the rotating encoder further comprises a first elastic member and a top abutting piece, the first elastic member is arranged in the accommodating hole, and the top abutting piece is arranged on the side of the first elastic member away from the rotating shaft; the side wall of the first cover facing the top abutting piece is provided with an annular concave-convex undulating surface, and the top abutting piece elastically abuts against the annular concave-convex undulating surface under the action of the first elastic member.

[0010] Optionally, the annular concave-convex undulating surface comprises a plurality of convex surfaces and a plurality of concave surfaces which are alternately distributed in a circle around the axis of the rotating shaft, the convex surfaces protrude towards the base, and the concave surfaces are recessed in the direction away from the base; and the top abutting piece is a top bead.

[0011] Optionally, the number of the accommodating holes is at least two, and the at least two accommodating holes are uniformly distributed in a circle around the axis of the rotating shaft, and each accommodating hole is provided with the first elastic member and the top abutting piece.

[0012] Optionally, the frame is sleeved outside the light shield, the inner wall of the frame is provided with a avoiding portion, and one of the light emitting element and the light sensitive element located on the outer side of the light shield is accommodated in the avoiding portion.

[0013] Optionally, the first cover has a through hole, and the rotating shaft passes through the through hole; the rotating shaft has an annular groove, and a collar is provided at the annular groove. The outer diameter of the collar is larger than the diameter of the through hole, and the collar is located on the side of the through hole facing the turntable.

[0014] Optionally, the rotary encoder further includes a second elastic element, which is disposed on the side of the circuit board facing the turntable, the end of the rotating shaft abuts against the second elastic element, and the collar abuts against the periphery of the through hole.

[0015] Optionally, the second elastic element includes a first connecting portion and a second connecting portion that are electrically connected. The circuit board is provided with a first electrical connection point and a second electrical connection point. The first connecting portion is electrically connected to the first electrical connection point, and the second connecting portion is opposite to and spaced apart from the second electrical connection point. When the rotating shaft is pressed, the rotating shaft pushes the second connecting portion to connect with the second electrical connection point, so that the first electrical connection point and the second electrical connection point are connected through the first connecting portion and the second connecting portion.

[0016] Optionally, the end of the rotating shaft facing the second elastic element is insulated from the second elastic element.

[0017] The above-described technical solutions adopted in the embodiments of this application can achieve the following beneficial effects:

[0018] In the embodiments of this application, the light-emitting element faces directly towards the photosensitive element. Thus, when the light-transmitting portion of the light-blocking device is located between the light-emitting element and the photosensitive element, the light emitted by the light-emitting element can be received by the photosensitive element. When the light-blocking portion of the light-blocking device is located between the light-emitting element and the photosensitive element, the light emitted by the light-emitting element cannot be received by the photosensitive element. Therefore, the rotation status of the shaft can be determined by the signal received by the photosensitive element.

[0019] As can be seen from the above analysis, in the embodiments of this application, the light-emitting element directly faces the photosensitive element, thus simplifying the optical path between the light-emitting element and the photosensitive element. Therefore, the problem of needing to open precise emission and reflection light transmission holes, as in related technologies, is avoided, which simplifies the structure of the rotary encoder.

[0020] Furthermore, in the embodiments of this application, the turntable is housed between the first cover and the frame, and the edge ring of the turntable is clamped between the first cover and the frame along the axial direction of the rotating shaft. This allows the turntable to be limited along the axial direction of the rotating shaft. The turntable is coaxially connected to the rotating shaft, allowing the turntable to be limited along the radial direction of the rotating shaft. This enables the turntable to rotate more precisely with the rotating shaft.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a rotary encoder provided in an embodiment of this application;

[0024] Figure 2 for Figure 1 The cross-sectional view of the rotary encoder shown in the figure;

[0025] Figure 3 for Figure 1 An exploded view of the rotary encoder is shown in the image.

[0026] Figure 4 A schematic diagram of a turntable and circuit board provided in an embodiment of this application;

[0027] Figure 5 for Figure 4 An exploded view of the turntable and circuit board is shown in the image.

[0028] Figure 6 A schematic diagram of a turntable provided in an embodiment of this application;

[0029] Figure 7 A schematic diagram of a circuit board provided in an embodiment of this application;

[0030] Figure 8 A schematic diagram of a circuit board, a frame, and a second cover provided in an embodiment of this application;

[0031] Figure 9 An exploded view of a first cover and a turntable provided in an embodiment of this application;

[0032] Figure 10 A schematic diagram of a first cover provided in an embodiment of this application;

[0033] Figure 11 This is a schematic diagram of a circuit board provided in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1- Rotary encoder;

[0036] 10-Shaft; 11-Ring groove; 12-Collar ring; 13-Insulating cap;

[0037] 20 - First cover; 21 - Annular undulating surface; 211 - Raised surface; 212 - Recessed surface; 22 - Perforation;

[0038] 30-Turntable; 31-Edge ring; 32-Light shield; 320-Light shield plate; 321-Light shielding part; 322-Light-transmitting part; 33-Base; 331-Accommodation hole; 34-First elastic element; 35-Top abutment;

[0039] 40 - Frame; 41 - Clearance section;

[0040] 50 - Circuit board; 51 - Light-emitting element; 52 - Photosensitive element; 53 - Second elastic element; 531 - First connecting part; 532 - Second connecting part; 541 - First electrical connection point; 542 - Second electrical connection point;

[0041] 60 - Second cover;

[0042] 70 - Outer shell. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] Furthermore, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application specification may have been selected by the applicant at his or her own discretion, and their detailed meanings are explained in the relevant sections of the description herein.

[0046] Furthermore, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0047] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0048] This application provides a rotary encoder. (See reference...) Figures 1 to 11 The rotary encoder 1 provided in this application embodiment includes: a rotating shaft 10, a first cover 20, a turntable 30, a frame 40, a circuit board 50, and a second cover 60.

[0049] A rotating shaft 10 passes through the first cover 20, and is rotatably connected to the first cover 20. The first cover 20, the frame 40, and the second cover 60 are arranged sequentially. A turntable 30 is housed between the first cover 20 and the frame 40. The turntable 30 includes an edge ring 31 and a light shield 32, with the edge ring 31 clamped between the first cover 20 and the frame 40 along the axial direction of the rotating shaft 10. The turntable 30 is coaxially connected to the rotating shaft 10 so as to rotate synchronously with the rotating shaft 10. A circuit board 50 is disposed between the frame 40 and the second cover 60.

[0050] A light-blocking device 32 is located on the side of the turntable 30 facing the circuit board 50. The light-blocking device 32 has multiple light-blocking portions 321 and multiple light-transmitting portions 322 arranged alternately in a circle around the axis of rotation 10. The circuit board 50 has a light-emitting element 51 and a photosensitive element 52 arranged opposite each other. One of the light-emitting element 51 and the photosensitive element 52 is located inside the light-blocking device 32, and the other is located outside the light-blocking device 32. The light-blocking device 32 is used to alternately block or transmit light emitted from the light-emitting element 51 toward the photosensitive element 52 during synchronous rotation with the rotation axis 10.

[0051] In this manner, in the embodiments of this application, the light-emitting element 51 faces directly towards the photosensitive element 52. Thus, when the light-transmitting portion 322 of the light-shielding device 32 is located between the light-emitting element 51 and the photosensitive element 52, the light emitted by the light-emitting element 51 can be received by the photosensitive element 52. When the light-shielding portion 321 of the light-shielding device 32 is located between the light-emitting element 51 and the photosensitive element 52, the light emitted by the light-emitting element 51 cannot be received by the photosensitive element 52. Therefore, the rotation status of the rotating shaft 10 can be determined by the signal received by the photosensitive element 52.

[0052] As can be seen from the above analysis, in the embodiments of this application, the light-emitting element 51 faces the photosensitive element 52 directly, thus making the optical path between the light-emitting element 51 and the photosensitive element 52 simpler. Therefore, the problem of needing to open precise light-emitting and light-reflecting apertures, as in related technologies, is avoided, which simplifies the structure of the rotary encoder 1.

[0053] Furthermore, in the embodiments of this application, the turntable 30 is housed between the first cover 20 and the frame 40, and the edge ring 31 of the turntable 30 is clamped between the first cover 20 and the frame 40 along the axial direction of the rotating shaft 10. This allows the turntable 30 to be positioned along the axial direction of the rotating shaft 10. The turntable 30 is coaxially connected to the rotating shaft 10, allowing the turntable 30 to be positioned radially along the rotating shaft 10. This enables the turntable 30 to rotate more precisely with the rotating shaft 10.

[0054] refer to Figure 5 and Figure 6 In some embodiments, the light shield 32 includes a plurality of light shielding plates 320 protruding toward the circuit board 50. The light shielding plates 320 are evenly distributed circumferentially around the axis of the rotating shaft 10, and the light shielding plates 320 form light-shielding portions 321. The gap between two adjacent light shielding plates 320 forms light-transmitting portions 322. In this way, the construction of the light shield 32 can be simplified, thereby reducing the processing cost of the turntable 30.

[0055] It should be noted that in other embodiments, the light shield 32 can be a light shield ring protruding towards the circuit board 50. Multiple through holes can be spaced apart on the light shield ring to form light-transmitting portions 322. Furthermore, the portions of the light shield ring without through holes form light-shielding portions 321. The specific structure of the light shield 32 will not be listed here; it is sufficient that it allows multiple light-shielding portions 321 and multiple light-transmitting portions 322 to be distributed alternately in a circle around the axis of rotation 10.

[0056] It should also be noted that the reference Figures 4 to 7 The light-blocking device 32 has a ring-shaped structure and is located between the light-emitting element 51 and the photosensitive element 52. Therefore, as the light-blocking device 32 rotates coaxially with the rotating shaft 10, it alternately opens or closes the optical path between the light-emitting element 51 and the photosensitive element 52, allowing the photosensitive element 52 to receive light signals intermittently. Furthermore, the rotation status of the rotating shaft 10 can be determined based on the signals received by the photosensitive element 52.

[0057] Since the solution provided in this application embodiment is still based on the alternating on or off optical paths of the light-emitting element 51 and the photosensitive element 52 to determine the rotation status of the rotating shaft 10, the prior art can be referred to for specific solutions based on the alternating on or off optical paths of the light-emitting element 51 and the photosensitive element 52 to determine the rotation status of the rotating shaft 10, and its working principle will not be explained here.

[0058] refer to Figure 2 , Figure 3 , Figure 5 , Figure 9 and Figure 10In some embodiments, the turntable 30 further includes a base 33. The base 33 is provided with a receiving hole 331. The rotary encoder 1 also includes a first elastic member 34 and a top abutment member 35. The first elastic member 34 is disposed in the receiving hole 331, and the top abutment member 35 is disposed on the side of the first elastic member 34 opposite to the rotating shaft 10. The side wall of the first cover 20 facing the top abutment member 35 is provided with an annular undulating surface 21, and the top abutment member 35 elastically abuts against the annular undulating surface 21 under the action of the first elastic member 34.

[0059] In this way, the abutment 35 can move relative to the annular concave-convex surface 21 during the rotation of the turntable 30, thereby creating a sense of gear shifting and improving the feel of rotating the shaft 10.

[0060] refer to Figure 9 and Figure 10 In some embodiments, the annular undulating surface 21 includes multiple raised surfaces 211 and multiple recessed surfaces 212. The raised surfaces 211 and recessed surfaces 212 are alternately distributed circumferentially around the axis of the rotating shaft 10. The raised surfaces 211 protrude towards the base 33, and the recessed surfaces 212 are recessed in a direction away from the base 33. The abutment 35 is a top bead. For example, the top bead is a steel column. In this way, during the rotation of the turntable 30, the turntable 30 is mainly subjected to radial force and not axial force, thus further improving the feel of rotating the rotating shaft 10.

[0061] refer to Figure 2 In some embodiments, the number of receiving holes 331 is at least two, and the at least two receiving holes 331 are evenly distributed around the axis of the rotating shaft 10. Each receiving hole 331 is provided with a first elastic member 34 and abutment member 35. For example, the number of receiving holes 331 is two, and the two receiving holes are distributed at 180 degrees to each other. Of course, in other embodiments, for example, the number of receiving holes 331 is three, four, or five, etc., which will not be listed here. In this way, the radial forces on the turntable 30 can cancel each other out during the rotation of the turntable 30, thereby improving the rotational stability of the turntable 30.

[0062] refer to Figure 3 and Figure 8 In some embodiments, the frame 40 is fitted over the light shield 32. The inner wall of the frame 40 has a clearance portion 41, which accommodates one of the light-emitting element 51 or the photosensitive element 52 located outside the light shield 32. For example, if the photosensitive element 52 is located outside the light shield 32, then the photosensitive element 52 is accommodated in the clearance portion 41. Furthermore, if the light-emitting element 51 is located outside the light shield 32, then the light-emitting element 51 is accommodated in the clearance portion 41.

[0063] refer to Figure 2 and Figure 3In some embodiments, the first cover 20 has a through hole 22. The rotating shaft 10 passes through the through hole 22. The rotating shaft 10 has an annular groove 11, and a collar 12 is provided at the annular groove 11. The outer diameter of the collar 12 is larger than the diameter of the through hole 22, and the collar 12 is located on the side of the through hole 22 facing the turntable 30. In this way, when the rotating shaft 10 is pulled outward, the collar 12 will abut against the periphery of the inner opening of the through hole 22, so as to prevent the rotating shaft 10 from being pulled out too easily and damaging the rotary encoder 1.

[0064] refer to Figure 2 In some embodiments, the rotary encoder 1 further includes a second elastic element 53. The second elastic element 53 is disposed on the side of the circuit board 50 facing the turntable 30, the end of the rotating shaft 10 abuts against the second elastic element 53, and the collar 12 abuts against the periphery of the opening of the through hole 22. In this way, by having the second elastic element 53 abut against the end of the rotating shaft 10, the collar 12 abuts against the periphery of the opening of the through hole 22, thereby eliminating the gap caused by the rotating shaft 10 moving up and down on its own.

[0065] refer to Figure 7 and Figure 11 In some embodiments, the second elastic member 53 includes a first connecting portion 531 and a second connecting portion 532 that are electrically connected. The circuit board 50 is provided with a first electrical connection point 541 and a second electrical connection point 542. The first connecting portion 531 is electrically connected to the first electrical connection point 541, and the second connecting portion 532 is opposite to and spaced apart from the second electrical connection point 542.

[0066] Combination Figure 3 When the rotating shaft 10 is pressed, the rotating shaft 10 pushes the second connecting part 532 to connect with the second electrical connection point 542, so that the first electrical connection point 541 and the second electrical connection point 542 are connected through the first connecting part 531 and the second connecting part 532.

[0067] For example, the second elastic element 53 is a metal dome button. A metal dome button is commonly known as a dome switch. For instance, the second elastic element 53 is made of a conductor. The outer ring of the second elastic element 53 forms a first connecting portion 531, and the center portion of the second elastic element 53 forms a second connecting portion 532. The first electrical connection point 541 is a conductive ring provided on the circuit board 50, and the second electrical connection point 542 is a conductive disc provided on the circuit board 50, with the conductive disc located inside the conductive ring. The outer ring of the second elastic element 53 is supported by the conductive ring, so that the first connecting portion 531 is electrically connected to the conductive ring. Therefore, when the rotating shaft 10 is pressed, the rotating shaft 10 pushes the center portion of the second elastic element 53 toward the conductive disc, so that the second connecting portion 532 connects with the conductive disc. Thus, the conductive ring and the conductive disc are electrically connected via the metal dome button.

[0068] Furthermore, for example, if the conductive disc is connected to a 5-volt voltage, and the conductive ring and conductive disc are connected via a button spring, a 5-volt voltage can be detected from the conductive ring. Therefore, based on the voltage of the conductive ring, it is possible to detect whether the rotating shaft 10 is pressed. This allows for corresponding control; for example, by detecting a pressing signal, the electronic device equipped with the rotary encoder 1 can be switched to the power-on state.

[0069] In some embodiments, the end of the shaft 10 facing the second elastic member 53 is insulated from the second elastic member 53. For example, refer to... Figure 2 and Figure 3 An insulating cap 13 is provided at the end of the rotating shaft 10 facing the second elastic member 53. For example, the insulating cap 13 is an insulating rubber cap with a certain elasticity to improve the pressing feel of the rotating shaft 10.

[0070] In some embodiments, the part where the rotating shaft 10 and the turntable 30 are inserted and fitted together is provided with a first anti-rotation surface, and the wall of the mounting hole of the turntable 30 is provided with a second anti-rotation surface that fits with the first anti-rotation surface. The turntable 30 can rotate synchronously with the rotating shaft 10 by means of the first anti-rotation surface and the second anti-rotation surface abutting each other.

[0071] It should be noted that in some embodiments, at least two sets of light-emitting elements 51 and photosensitive elements 52 may be provided. For example, when there are two sets of light-emitting elements 51 and photosensitive elements 52, the two sets of light-emitting elements 51 and photosensitive elements 52 are staggered. For example, when the optical path of one set of light-emitting elements 51 and photosensitive elements 52 is in a conducting state, the optical path of the other set of light-emitting elements 51 and photosensitive elements 52 is in a cut-off state, and after the turntable 30 rotates by a preset angle, the optical path of the other set of light-emitting elements 51 and photosensitive elements 52 switches to a conducting state. In this way, the rotation direction of the rotating shaft 10 can be determined by the two sets of light-emitting elements 51 and photosensitive elements 52.

[0072] Of course, in other embodiments, only one set of light-emitting elements 51 and photosensitive elements 52 may be provided. This will not be described in detail here.

[0073] refer to Figure 1 and Figure 3In some embodiments, the rotary encoder 1 further includes a housing 70. Exemplarily, the housing 70 is a sheet metal part. The sheet metal part may cover the first cover 20, the frame 40, the circuit board 50, and the second cover 60 to prevent the first cover 20, the frame 40, the circuit board 50, and the second cover 60 from accidentally separating. Of course, in other embodiments, the housing 70 may not be provided. For example, adhesive may be provided at the connection points and outer surfaces between the first cover 20, the frame 40, the circuit board 50, and the second cover 60 to prevent accidental separation of the first cover 20, the frame 40, the circuit board 50, and the second cover 60.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the embodiments of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary encoder characterized by, The utility model relates to a rotating encoder, including: Rotating shaft (10), first cover (20), rotating disc (30), frame (40), circuit board (50) and second cover (60); Rotating shaft (10) is arranged in first cover (20), and rotating shaft (10) is connected with first cover (20) rotationally; First cover (20), frame (40) and second cover (60) are sequentially arranged, rotating disc (30) is contained between first cover (20) and frame (40), and rotating disc (30) includes edge ring (31) and shutter (32), edge ring (31) is clamped between first cover (20) and frame (40) along the axial direction of rotating shaft (10), and rotating disc (30) is coaxially connected with rotating shaft (10) to rotate synchronously with rotating shaft (10), and circuit board (50) is arranged between frame (40) and second cover (60); Shutter (32) is arranged on the side of rotating disc (30) towards circuit board (50), shutter (32) is provided with a plurality of shading parts (321) and a plurality of light-transmitting parts (322) that are alternately distributed in the circumferential direction of the axis of rotating shaft (10), circuit board (50) is provided with light emitting element (51) and photosensitive element (52) arranged oppositely, one of light emitting element (51) and photosensitive element (52) is arranged on the inner side of shutter (32), and the other is arranged on the outer side of shutter (32), and shutter (32) is used for alternately shielding or transmitting the light emitted by light emitting element (51) towards photosensitive element (52) during synchronous rotation with rotating shaft (10).

2. The rotary encoder of claim 1, wherein, Shutter (32) includes a plurality of shading pieces (320) protruding towards circuit board (50), the shading pieces (320) are uniformly distributed in the circumferential direction of the axis of rotating shaft (10), and the shading pieces (320) form the shading parts (321), and the interval between the adjacent two shading pieces (320) forms the light-transmitting part (322).

3. The rotary encoder of claim 1, wherein, Rotating disc (30) further includes base (33), base (33) is provided with containing hole (331), rotating encoder further includes first elastic member (34) and abutting member (35), first elastic member (34) is arranged in containing hole (331), abutting member (35) is arranged on the side, away from rotating shaft (10), of first elastic member (34), the side wall of first cover (20) towards abutting member (35) is provided with annular concave-convex undulating surface (21), and abutting member (35) is elastically abutted with annular concave-convex undulating surface (21) under the action of first elastic member (34).

4. The rotary encoder of claim 3, wherein, The annular concave-convex surface (21) comprises a plurality of convex surfaces (211) and a plurality of concave surfaces (212), the convex surfaces (211) and the concave surfaces (212) are alternately distributed around the axis of the rotating shaft (10) respectively, the convex surfaces (211) protrude towards the base (33), and the concave surfaces (212) are recessed in a direction away from the base (33); the top abutting piece (35) is a top bead.

5. The rotary encoder of claim 3, wherein, The number of the accommodating holes (331) is at least two, and the at least two accommodating holes (331) are uniformly distributed around the axis of the rotating shaft (10), and each of the accommodating holes (331) is provided with the first elastic piece (34) and the top abutting piece (35).

6. The rotary encoder of claim 1, wherein, The frame (40) is sleeved outside the light shield (32), an inner wall of the frame (40) is provided with a avoiding part (41), and one of the light emitting element (51) and the light sensitive element (52) located outside the light shield (32) is accommodated in the avoiding part (41).

7. The rotary encoder of claim 1, wherein, The first cover body (20) is provided with a through hole (22), and the rotating shaft (10) is arranged in the through hole (22); the rotating shaft (10) is provided with an annular groove (11), and the annular groove (11) is provided with a sleeve ring (12), an outer diameter of the sleeve ring (12) is greater than a hole diameter of the through hole (22), and the sleeve ring (12) is located on a side of the through hole (22) facing the rotating disc (30).

8. The rotary encoder of claim 7, wherein, The rotary encoder further comprises a second elastic piece (53), the second elastic piece (53) is arranged on a side of the circuit board (50) facing the rotating disc (30), an end of the rotating shaft (10) abuts against the second elastic piece (53), and the sleeve ring (12) abuts against a hole edge of the through hole (22).

9. The rotary encoder of claim 8, wherein, The second elastic piece (53) comprises a first connecting part (531) and a second connecting part (532) electrically connected, the circuit board (50) is provided with a first electrical connection point (541) and a second electrical connection point (542), the first connecting part (531) is electrically connected with the first electrical connection point (541), and the second connecting part (532) is oppositely and spacedly distributed with the second electrical connection point (542); When the rotating shaft (10) is pressed, the rotating shaft (10) pushes the second connecting part (532) to be connected with the second electrical connection point (542), so that the first electrical connection point (541) and the second electrical connection point (542) are conducted through the first connecting part (531) and the second connecting part (532).

10. The rotary encoder of claim 9, wherein, The end of the rotating shaft (10) facing the second elastic piece (53) is insulated and separated from the second elastic piece (53).

Images