Encoder

Abstract

The utility model provides an encoder comprising a main body provided with a cavity and a through hole which are communicated with each other; the circuit board is arranged in the cavity; the magnetic induction piece is arranged on the circuit board and is electrically connected with the circuit board; one end of the rotating shaft extends into the cavity through the through hole; the magnet is arranged at the end, located in the cavity, of the rotating shaft, and the magnetic induction piece is opposite to the magnet in the axial direction of the rotating shaft; the thickness d1 of the magnet is larger than or equal to 0.5 mm and smaller than or equal to 3 mm. That is to say, the thickness of the magnet is reduced, that is, the magnet is made into a sheet structure, so that the occupied space of the magnet in the thickness direction is greatly reduced while effective cooperation of the magnetic induction piece and the magnet is ensured, the thickness size of the encoder is reduced, the size of the encoder is remarkably reduced, and the encoder is compact in structure and convenient to manufacture. And the application requirement of miniaturization is met. Moreover, processing is simple, and manufacturing is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of encoders, in particular to an encoder. Background Art

[0002] An encoder is a sensor device that collects, compiles and converts signals or data into signals that can be communicated, transmitted and stored. It is a detection and feedback unit used to provide real-time feedback on positions, speeds, angles and other states.

[0003] At present, the overall size of the magnetoelectric encoder in the related technology is relatively large, which is not conducive to the application requirements of miniaturization. Utility Model Content

[0004] The embodiments of the utility model are intended to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of an embodiment of the present utility model provides an encoder.

[0006] In view of this, according to the first aspect of an embodiment of the utility model, an encoder is provided, the encoder comprising: a main body, the main body is provided with a connected cavity and a through hole; a circuit board, arranged in the cavity; a magnetic induction component, arranged on the circuit board and electrically connected to the circuit board; a rotating shaft, one end of the rotating shaft extends into the cavity through the through hole; a magnet, arranged at one end of the rotating shaft located in the cavity, along the axial direction of the rotating shaft, the magnetic induction component is opposite to the magnet; wherein the thickness d1 of the magnet satisfies 0.5mm≤d1≤3mm.

[0007] The encoder provided by the embodiment of the utility model includes a main body, a circuit board, a magnetic induction component, a rotating shaft and a magnet. Specifically, the main body is provided with a cavity and a through hole, and the cavity and the through hole are connected. The circuit board is arranged in the cavity. One end of the rotating shaft is inserted into the cavity through the through hole, and the magnet is fixed on one end of the rotating shaft located in the cavity.

[0008] The magnetic sensing element is arranged on the circuit board and is electrically connected to the circuit board. The magnetic sensing element is opposite to the magnet along the axial direction of the rotating shaft. Specifically, when the rotating shaft rotates, the magnet is driven to rotate synchronously. The magnetic sensing element senses the angular displacement of the magnet and outputs an electrical signal after being processed by the circuit board, so that the rotation angle of the rotating shaft can be accurately measured.

[0009] The thickness of the magnet is between 0.5mm and 3mm. Optionally, the thickness of the magnet is 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm or 3mm. The size of the magnet can be adjusted specifically according to the parameters of the magnetic induction component. In other words, the thickness of the magnet is reduced, that is, the magnet is made into a thin sheet structure, so that while ensuring the effective cooperation between the magnetic induction component and the magnet, the space occupied by the magnet in the thickness direction is greatly reduced, which is conducive to reducing the thickness of the encoder, thereby significantly reducing the volume of the encoder, making the encoder compact, and facilitating miniaturization application requirements. Moreover, the processing is simple and the manufacturing is convenient.

[0010] Optionally, the encoder comprises a magneto-electric encoder.

[0011] Optionally, the rotating shaft is provided with a connecting hole, and the connecting hole is used to connect the motor shaft to the waiting detection equipment.

[0012] In addition, the encoder provided according to the above technical solution of the utility model also has the following additional technical features:

[0013] In some technical solutions, optionally, the encoder also includes a bearing, which is arranged on the outer periphery of the rotating shaft and located at the through hole, and the rotating shaft can drive the bearing to rotate relative to the main body; wherein, along the axial direction of the rotating shaft, the distance between the side of the magnet facing away from the circuit board and the side of the bearing facing the circuit board is less than the set distance.

[0014] In this technical solution, it is defined that the encoder also includes a bearing. Specifically, the bearing sleeve is arranged on the outside of the rotating shaft, that is, the rotating shaft can drive the bearing to rotate relative to the main body.

[0015] Along the axial direction of the rotating shaft, the distance between the side of the magnet facing away from the circuit board and the side of the bearing facing the circuit board is smaller than the set distance, that is, the distance between the bottom surface of the magnet and the top surface of the bearing is smaller, which is conducive to further reducing the axial size of the encoder and making the structure of the encoder more compact, thereby further reducing the volume of the encoder.

[0016] In addition, since the main body is provided with a through hole structure and the bearing is located at the through hole, that is, the part where the main body and the bearing cooperate adopts a through hole design, it is beneficial to save installation space and reduce the axial size of the encoder.

[0017] In some technical solutions, optionally, along the axial direction of the rotating shaft, the side of the magnet facing away from the circuit board is higher than the end face of the bearing facing the circuit board; or along the axial direction of the rotating shaft, the side of the magnet facing away from the circuit board is flush with the end face of the bearing facing the circuit board.

[0018] In this technical solution, along the axial direction of the rotating shaft, the side of the magnet facing away from the circuit board is higher than the end surface of the bearing facing the circuit board, that is, the bottom surface of the magnet is higher than the top surface of the bearing, that is, the distance between the bottom surface of the magnet and the top surface of the bearing is greater than 0. It can be understood that since the distance between the bottom surface of the magnet and the top surface of the bearing is small, it is beneficial to reduce the axial size of the encoder and make the structure of the encoder more compact.

[0019] Alternatively, along the axial direction of the rotating shaft, the side of the magnet facing away from the circuit board is flush with the end surface of the bearing facing the circuit board, that is, the distance between the bottom surface of the magnet and the top surface of the bearing is 0, thereby further reducing the axial size of the encoder, making the structure of the encoder more compact, and facilitating further reducing the volume of the encoder.

[0020] In some technical schemes, optionally, the number of bearings is at least two, and at least two bearings are arranged axially along the rotating shaft; wherein, the at least two bearings include a first bearing and a second bearing, the first bearing is closer to the circuit board than the second bearing, and the distance between a side of the magnet facing away from the circuit board and a side of the first bearing facing the circuit board is less than a set distance.

[0021] In this technical solution, the number of bearings is limited to at least two, specifically, at least two bearings are arranged along the axial direction of the rotating shaft. The at least two bearings include a first bearing and a second bearing, the first bearing is closer to the circuit board than the second bearing, that is, the first bearing is located above the second bearing.

[0022] The distance between the side of the magnet facing away from the circuit board and the side of the first bearing facing the circuit board is smaller than the set distance, that is, the distance between the bottom surface of the magnet and the top surface of the first bearing is smaller, thereby further reducing the axial dimension of the encoder and making the structure of the encoder more compact, which is beneficial to further reduce the volume of the encoder.

[0023] In some technical solutions, optionally, the encoder also includes a gasket, which is arranged between the first bearing and the second bearing.

[0024] In this technical solution, it is defined that the encoder also includes a gasket. Specifically, the gasket is arranged between the first bearing and the second bearing to prevent friction or slipping between the first bearing and the second bearing, thereby ensuring the measurement accuracy of the encoder and extending the service life of the encoder.

[0025] In some technical solutions, optionally, the thickness d2 of the gasket satisfies 0.2mm≤d2≤0.5mm.

[0026] In this technical solution, the thickness of the gasket is limited to between 0.2 mm and 0.5 mm. That is to say, the first bearing and the second bearing are separated by an ultra-thin gasket, so as to prevent friction or slipping between the first bearing and the second bearing while making the installation space of the first bearing and the second bearing as compact as possible, which is conducive to further reducing the thickness of the encoder and thus reducing the volume of the encoder.

[0027] Optionally, the thickness of the gasket is 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0028] In some technical solutions, optionally, the encoder further includes a first adhesive component, through which the bearing is rotatably connected to the hole wall of the through hole; and / or the encoder further includes a second adhesive component, through which the bearing is connected to the rotating shaft.

[0029] In this technical solution, it is defined that the encoder also includes a first adhesive component. Specifically, the bearing is rotatably connected to the wall of the through hole through the first adhesive component. Compared with the related technology of setting a step on the inner wall of the main body to axially limit the bearing, it is beneficial to further reduce the overall axial structural dimensions of the encoder and reduce the overall volume of the encoder.

[0030] The encoder also includes a second adhesive component. Specifically, the bearing is connected to the rotating shaft through the second adhesive component, thereby achieving a reliable connection between the bearing and the rotating shaft and improving the assembly efficiency of the encoder.

[0031] Optionally, the first adhesive comprises anaerobic adhesive.

[0032] Optionally, the second adhesive comprises anaerobic adhesive.

[0033] In some technical solutions, optionally, the magnetic induction component is arranged on a side of the circuit board facing the magnet; or the magnetic induction component is arranged on a side of the circuit board facing away from the magnet.

[0034] In this technical solution, the magnetic induction component is arranged on the side of the circuit board facing the magnet, that is, the magnetic induction component is arranged at the bottom of the circuit board. Alternatively, the magnetic induction component is arranged on the side of the circuit board away from the magnet, that is, the magnetic induction component is arranged on the top of the circuit board. The specific arrangement can be based on actual needs.

[0035] It can be understood that, when the magnetic induction component is disposed at the bottom of the circuit board, a certain gap is left between the magnetic induction component and the magnet along the axial direction of the rotating shaft.

[0036] In the case where the magnetic induction component is arranged on the top of the circuit board, it can be understood that since a certain distance needs to be maintained between the magnet and the magnetic induction component, specifically, the distance is generally between 0.8mm and 3mm, arranging the magnetic induction component on the side of the circuit board away from the magnet is beneficial to reducing the gap between the circuit board and the magnet, making full use of the thickness space of the circuit board, thereby minimizing the height of the encoder, that is, reducing the overall axial size of the encoder, reducing the volume of the encoder, and making the encoder more refined.

[0037] In some technical solutions, optionally, a groove is provided at one end of the rotating shaft, the groove is connected to the cavity, and at least a portion of the magnet is embedded in the groove.

[0038] In this technical solution, a groove is provided at one end of the rotating shaft. Specifically, the groove is connected to the cavity, and at least part of the magnet is embedded in the groove, thereby reducing the space occupied by the magnet in the axial direction, further reducing the overall axial size of the encoder, reducing the overall volume of the encoder, and making the encoder structure more compact.

[0039] Moreover, embedding at least part of the magnet into the groove is beneficial to improving the installation reliability of the magnet and ensuring the measurement accuracy of the encoder.

[0040] In some technical solutions, optionally, the main body includes a base and a cover body, wherein the base is provided with a communicating receiving groove and a through hole, and the cover body is provided at the groove opening of the receiving groove and is enclosed with the groove wall of the receiving groove to form a cavity.

[0041] In this technical solution, it is defined that the main body includes a base and a cover body. Specifically, the base is provided with a receiving groove and a through hole, the cover body is arranged at the groove opening of the receiving groove, and the cover body and the groove wall of the receiving groove are enclosed to form a cavity.

[0042] Optionally, a sealing member is provided at the connection between the cover and the base to seal the connection between the cover and the base, wherein the sealing member comprises anaerobic adhesive, so that the sealing can be achieved while the cover and the base are connected.

[0043] Additional aspects and advantages of the present invention will be given in the following description, and some will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1 A schematic structural diagram of an encoder according to an embodiment of the utility model is shown.

[0046] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0047] 100 encoder, 110 main body, 111 cavity, 112 through hole, 113 base, 114 cover, 115 receiving groove, 120 circuit board, 130 magnetic induction component, 140 rotating shaft, 141 groove, 150 magnet, 160 bearing, 161 first bearing, 162 second bearing, 170 gasket, 180 first adhesive component, 190 second adhesive component. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0050] Refer to the following Figure 1 The encoder 100 provided according to some embodiments of the present invention is described.

[0051] In one embodiment according to the present application, Figure 1 As shown, an encoder 100 is proposed, and the encoder 100 includes: a main body 110, the main body 110 is provided with a connected cavity 111 and a through hole 112; a circuit board 120, which is arranged in the cavity 111; a magnetic induction component 130, which is arranged on the circuit board 120 and electrically connected to the circuit board 120; a rotating shaft 140, one end of the rotating shaft 140 extends into the cavity 111 through the through hole 112; a magnet 150, which is arranged at one end of the rotating shaft 140 located in the cavity 111, and along the axial direction of the rotating shaft 140, the magnetic induction component 130 is opposite to the magnet 150; wherein, the thickness d1 of the magnet 150 satisfies 0.5mm≤d1≤3mm.

[0052] The encoder 100 provided by the embodiment of the utility model includes a main body 110, a circuit board 120, a magnetic induction component 130, a rotating shaft 140 and a magnet 150. Specifically, the main body 110 is provided with a cavity 111 and a through hole 112, and the cavity 111 and the through hole 112 are connected. The circuit board 120 is arranged in the cavity 111. One end of the rotating shaft 140 is inserted into the cavity 111 through the through hole 112, and the magnet 150 is fixed to one end of the rotating shaft 140 located in the cavity 111.

[0053] The magnetic sensing element 130 is disposed on the circuit board 120, and the magnetic sensing element 130 is electrically connected to the circuit board 120. The magnetic sensing element 130 is opposite to the magnet 150 along the axial direction of the rotating shaft 140. Specifically, when the rotating shaft 140 rotates, the magnet 150 is driven to rotate synchronously. The magnetic sensing element 130 senses the angular displacement of the magnet 150, and at the same time, the output electrical signal is processed by the circuit board 120, so that the rotation angle of the rotating shaft 140 can be accurately measured.

[0054] The thickness of the magnet 150 is between 0.5 mm and 3 mm. Optionally, the thickness of the magnet 150 is 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm or 3 mm. Specifically, the size of the magnet 150 can be adjusted according to the parameters of the magnetic induction component 130. In other words, the thickness of the magnet 150 is reduced, that is, the magnet 150 is made into a thin sheet structure, so that while ensuring the effective cooperation between the magnetic induction component 130 and the magnet 150, the space occupied by the magnet 150 in the thickness direction is greatly reduced, which is conducive to reducing the thickness of the encoder 100, thereby significantly reducing the volume of the encoder 100, making the encoder 100 compact, and is conducive to miniaturization application requirements. Moreover, the processing is simple and the manufacturing is convenient.

[0055] Optionally, the encoder 100 comprises a magneto-electric encoder.

[0056] Optionally, the rotating shaft 140 is provided with a connecting hole, and the connecting hole is used to connect the motor shaft to the waiting detection equipment.

[0057] like Figure 1 As shown, in some embodiments, optionally, the encoder 100 also includes a bearing 160, which is disposed on the outer periphery of the rotating shaft 140 and located at the through hole 112, and the rotating shaft 140 can drive the bearing 160 to rotate relative to the main body 110; wherein, along the axial direction of the rotating shaft 140, the distance between the side of the magnet 150 facing away from the circuit board 120 and the side of the bearing 160 facing the circuit board 120 is less than the set distance.

[0058] In this embodiment, it is defined that the encoder 100 further includes a bearing 160 . Specifically, the bearing 160 is sleeved on the outside of the rotating shaft 140 . That is, the rotating shaft 140 can drive the bearing 160 to rotate relative to the main body 110 .

[0059] Along the axial direction of the rotating shaft 140, the distance between the side of the magnet 150 facing away from the circuit board 120 and the side of the bearing 160 facing the circuit board 120 is less than the set distance, that is, the distance between the bottom surface of the magnet 150 and the top surface of the bearing 160 is smaller, which is beneficial to further reduce the axial dimension of the encoder 100 and make the structure of the encoder 100 more compact, thereby further reducing the volume of the encoder 100.

[0060] In addition, since the main body 110 is provided with a through hole 112 structure and the bearing 160 is located at the through hole 112, that is, the part where the main body 110 and the bearing 160 cooperate adopts the through hole 112 design, it is beneficial to save installation space and reduce the axial size of the encoder 100.

[0061] In some embodiments, optionally, along the axial direction of the rotating shaft 140, the side of the magnet 150 facing away from the circuit board 120 is higher than the end surface of the bearing 160 facing the circuit board 120; or along the axial direction of the rotating shaft 140, the side of the magnet 150 facing away from the circuit board 120 is flush with the end surface of the bearing 160 facing the circuit board 120.

[0062] In this embodiment, in the axial direction of the rotating shaft 140, the side surface of the magnet 150 facing away from the circuit board 120 is higher than the side end surface of the bearing 160 facing the circuit board 120, that is, the bottom surface of the magnet 150 is higher than the top surface of the bearing 160, that is, the distance between the bottom surface of the magnet 150 and the top surface of the bearing 160 is greater than 0. It can be understood that since the distance between the bottom surface of the magnet 150 and the top surface of the bearing 160 is small, it is beneficial to reduce the axial size of the encoder 100, making the structure of the encoder 100 more compact.

[0063] Alternatively, along the axial direction of the rotating shaft 140, the side of the magnet 150 facing away from the circuit board 120 is flush with the end surface of the bearing 160 facing the circuit board 120, that is, the distance between the bottom surface of the magnet 150 and the top surface of the bearing 160 is 0, thereby further reducing the axial dimension of the encoder 100, making the structure of the encoder 100 more compact, and facilitating further reducing the volume of the encoder 100.

[0064] like Figure 1 As shown, in some embodiments, optionally, the number of bearings 160 is at least two, and at least two bearings 160 are arranged axially along the rotating shaft 140; wherein, the at least two bearings 160 include a first bearing 161 and a second bearing 162, the first bearing 161 is closer to the circuit board 120 than the second bearing 162, and the distance between the side of the magnet 150 facing away from the circuit board 120 and the side of the first bearing 161 facing the circuit board 120 is less than the set distance.

[0065] In this embodiment, the number of the bearings 160 is limited to at least two, specifically, the at least two bearings 160 are arranged along the axial direction of the rotating shaft 140. The at least two bearings 160 include a first bearing 161 and a second bearing 162, and the first bearing 161 is closer to the circuit board 120 than the second bearing 162, that is, the first bearing 161 is located above the second bearing 162.

[0066] The distance between the side of the magnet 150 facing away from the circuit board 120 and the side of the first bearing 161 facing the circuit board 120 is smaller than the set distance, that is, the distance between the bottom surface of the magnet 150 and the top surface of the first bearing 161 is smaller, thereby further reducing the axial dimension of the encoder 100, making the structure of the encoder 100 more compact, which is beneficial to further reduce the volume of the encoder 100.

[0067] like Figure 1 As shown, in some embodiments, optionally, the encoder 100 further includes a gasket 170 , and the gasket 170 is disposed between the first bearing 161 and the second bearing 162 .

[0068] In this embodiment, it is defined that the encoder 100 also includes a gasket 170. Specifically, the gasket 170 is disposed between the first bearing 161 and the second bearing 162 to prevent friction or slippage between the first bearing 161 and the second bearing 162, thereby ensuring the measurement accuracy of the encoder 100 and extending the service life of the encoder 100.

[0069] like Figure 1 As shown, in some embodiments, optionally, the thickness d2 of the gasket 170 satisfies, 0.2 mm≤d2≤0.5 mm.

[0070] In this embodiment, the thickness of the gasket 170 is limited to between 0.2 mm and 0.5 mm, that is, the first bearing 161 and the second bearing 162 are spaced by the ultra-thin gasket 170, so that friction or slipping between the first bearing 161 and the second bearing 162 can be prevented while making the installation space of the first bearing 161 and the second bearing 162 as compact as possible, which is beneficial to further reduce the thickness of the encoder 100 and thus reduce the volume of the encoder 100.

[0071] Optionally, the thickness of the gasket 170 is 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0072] like Figure 1 As shown, in some embodiments, optionally, the encoder 100 also includes a first adhesive 180, and the bearing 160 is rotatably connected to the hole wall of the through hole 112 through the first adhesive 180; and / or the encoder 100 also includes a second adhesive 190, and the bearing 160 is connected to the rotating shaft 140 through the second adhesive 190.

[0073] In this embodiment, it is defined that the encoder 100 also includes a first adhesive component 180. Specifically, the bearing 160 is rotatably connected to the wall of the through hole 112 via the first adhesive component 180. Compared with the related art in which a step is set on the inner wall of the main body 110 to axially limit the bearing 160, it is beneficial to further reduce the overall axial structural dimensions of the encoder 100 and reduce the overall volume of the encoder 100.

[0074] The encoder 100 further includes a second adhesive member 190 . Specifically, the bearing 160 is connected to the rotating shaft 140 via the second adhesive member 190 , thereby achieving a reliable connection between the bearing 160 and the rotating shaft 140 , thereby improving the assembly efficiency of the encoder 100 .

[0075] Optionally, the first adhesive 180 includes anaerobic adhesive.

[0076] Optionally, the second adhesive 190 includes anaerobic adhesive.

[0077] In some embodiments, optionally, the magnetic induction element 130 is disposed on a side of the circuit board 120 facing the magnet 150 ; or the magnetic induction element 130 is disposed on a side of the circuit board 120 facing away from the magnet 150 .

[0078] In this embodiment, the magnetic induction component 130 is arranged on the side of the circuit board 120 facing the magnet 150, that is, the magnetic induction component 130 is arranged at the bottom of the circuit board 120. Alternatively, the magnetic induction component 130 is arranged on the side of the circuit board 120 away from the magnet 150, that is, the magnetic induction component 130 is arranged on the top of the circuit board 120. The specific arrangement can be made according to actual needs.

[0079] It is understandable that, when the magnetic induction component 130 is disposed at the bottom of the circuit board 120 , a certain gap is left between the magnetic induction component 130 and the magnet 150 along the axial direction of the rotating shaft 140 .

[0080] When the magnetic induction component 130 is arranged on the top of the circuit board 120, it can be understood that since a certain distance needs to be maintained between the magnet 150 and the magnetic induction component 130, specifically, the distance is generally between 0.8mm and 3mm, setting the magnetic induction component 130 on the side of the circuit board 120 away from the magnet 150 is beneficial to reducing the gap between the circuit board 120 and the magnet 150, making full use of the thickness space of the circuit board 120, thereby minimizing the height of the encoder 100, that is, reducing the overall axial size of the encoder 100, reducing the volume of the encoder 100, and making the encoder 100 more refined.

[0081] like Figure 1As shown, in some embodiments, optionally, a groove 141 is provided at one end of the rotating shaft 140 , the groove 141 is communicated with the cavity 111 , and at least a portion of the magnet 150 is embedded in the groove 141 .

[0082] In this embodiment, a groove 141 is provided at one end of the rotating shaft 140. Specifically, the groove 141 is connected to the cavity 111, and at least a portion of the magnet 150 is embedded in the groove 141, thereby reducing the space occupied by the magnet 150 in the axial direction, further reducing the overall axial size of the encoder 100, reducing the overall volume of the encoder 100, and making the encoder 100 more compact.

[0083] Moreover, embedding at least a portion of the magnet 150 into the groove 141 is beneficial to improving the installation reliability of the magnet 150 and ensuring the measurement accuracy of the encoder 100.

[0084] like Figure 1 As shown, in some embodiments, optionally, the main body 110 includes a base 113 and a cover body 114, wherein the base 113 is provided with a connected receiving groove 115 and a through hole 112, and the cover body 114 is provided at the notch of the receiving groove 115 and is enclosed with the groove wall of the receiving groove 115 to form a cavity 111.

[0085] In this embodiment, the main body 110 is defined to include a base 113 and a cover 114 . Specifically, the base 113 is provided with a receiving groove 115 and a through hole 112 , the cover 114 is provided at the notch of the receiving groove 115 , and the cover 114 and the groove wall of the receiving groove 115 are enclosed to form a cavity 111 .

[0086] Optionally, a sealing member is provided at the connection between the cover 114 and the base 113 to seal the connection between the cover 114 and the base 113. The sealing member includes anaerobic adhesive, so that the cover 114 and the base 113 can be sealed while being connected.

[0087] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0088] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An encoder, characterized in that: include: A main body, wherein the main body is provided with a cavity and a through hole that are connected to each other; A circuit board is disposed in the cavity; A magnetic induction component is disposed on the circuit board and electrically connected to the circuit board; A rotating shaft, one end of which extends into the cavity through the through hole; A magnet is disposed at one end of the rotating shaft located in the cavity, and along the axial direction of the rotating shaft, the magnetic induction component is opposite to the magnet; Wherein, the thickness d1 of the magnet satisfies 0.5mm≤d1≤3mm.

2. The encoder according to claim 1, characterized in that Also includes: A bearing, arranged on the outer periphery of the rotating shaft and located at the through hole, wherein the rotating shaft can drive the bearing to rotate relative to the main body; Wherein, along the axial direction of the rotating shaft, the distance between a side surface of the magnet facing away from the circuit board and a side surface of the bearing facing the circuit board is smaller than a set distance.

3. The encoder according to claim 2, characterized in that Along the axial direction of the rotating shaft, a side surface of the magnet facing away from the circuit board is higher than an end surface of the bearing facing the circuit board; or Along the axial direction of the rotating shaft, a side surface of the magnet facing away from the circuit board is flush with an end surface of the bearing facing the circuit board.

4. The encoder according to claim 2, characterized in that The number of the bearings is at least two, and at least two of the bearings are arranged along the axial direction of the rotating shaft; Among them, at least two of the bearings include a first bearing and a second bearing, the first bearing is closer to the circuit board than the second bearing, and the distance between a side of the magnet facing away from the circuit board and a side of the first bearing facing the circuit board is less than the set distance.

5. The encoder according to claim 4, characterized in that Also includes: A gasket is arranged between the first bearing and the second bearing.

6. The encoder according to claim 5, characterized in that The thickness d2 of the gasket satisfies 0.2mm≤d2≤0.5mm.

7. The encoder according to claim 2, characterized in that The encoder further comprises a first adhesive component, and the bearing is rotatably connected to the hole wall of the through hole via the first adhesive component; and / or The encoder further includes a second adhesive component, and the bearing is connected to the rotating shaft via the second adhesive component.

8. The encoder according to any one of claims 1 to 7, characterized in that The magnetic induction element is arranged on a side of the circuit board facing the magnet; or The magnetic induction component is arranged on a side of the circuit board away from the magnet.

9. The encoder according to any one of claims 1 to 7, characterized in that A groove is provided at one end of the rotating shaft, the groove is communicated with the cavity, and at least a portion of the magnet is embedded in the groove.

10. The encoder according to any one of claims 1 to 7, characterized in that The subject includes: A base, wherein the base is provided with a receiving groove and the through hole that are connected to each other; The cover body is arranged at the notch of the containing groove and is surrounded with the groove wall of the containing groove to form the cavity.

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