A reflective encoder disk

Abstract

This utility model relates to the field of reflective code disks, specifically a reflective code disk, including an inner cylinder assembly; an adjustment component is fixed to the outer side of the port of the inner cylinder assembly, and an outer cylinder assembly is rotatably disposed on the outer side of the inner cylinder assembly; the working end of the elastic component is connected to the outer wall of the end opposite to the adjustment component of the inner cylinder assembly. Rotating the cylinder causes the base plate assembly to rotate, thereby misaligning the reflective coating and the light shield, increasing the frequency of light irradiation received by the photoelectric sensor. When the frequency of irradiation received by the photoelectric sensor increases, its measurement accuracy becomes more refined, thus adjusting the accuracy of the code disk. A protective film protects the glass substrate and the reflective coating, preventing scratches on the surface of the glass substrate. In addition, a side sleeve is provided on the side of the glass substrate, and the side sleeve wraps the protective film inside, preventing the glass substrate from breaking due to impact, thus improving the protective effect.

Description

Technical Field

[0001] This utility model relates to the field of reflective code disks, specifically a reflective code disk. Background Technology

[0002] The code disk is an important component of an optical encoder. It mainly works on the principle of photoelectric conversion. When light shines on the coding pattern on the code disk, the changes in reflected or transmitted light are received by the photoelectric sensor and converted into electrical signals. The corresponding angle and displacement information are then analyzed. Code disks are made of many materials. Among them, glass code disks are made of high-transmittance glass as the base material. They are easy to miniaturize, have good stability, and high precision.

[0003] A patent with publication number CN217210913U discloses a reflective code disk, encoder, and grating ruler. The reflective code disk has a light source and a light source readout chip on the same side. The code disk includes: a glass substrate with coated surfaces on both sides; a first structure and a second structure disposed on the coated surfaces on both sides of the substrate. The first and second structures contain different types of optical materials, including light-absorbing materials and reflective materials. The reflective materials have high reflectivity for light of the wavelength required by the light source readout chip; the light-absorbing materials have low reflectivity for light of the wavelength required by the light source readout chip; and etched patterns are provided on the first or second structure. The high reflectivity of the reflective material improves the accuracy of the code disk, while the low reflectivity of the light-absorbing material avoids stray light interference. Furthermore, the glass substrate has high flatness, preventing precision errors caused by code disk deformation.

[0004] Because the spacing of the reflective coating on existing glass code disks is fixed, the measurement accuracy is also fixed and cannot be adjusted according to usage requirements. When it is necessary to change the measurement accuracy, a code disk of a different accuracy must be replaced, which limits the scope of application. Therefore, a reflective code disk is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and address the problems existing in existing technologies, this utility model proposes a reflective code disk.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a reflective code disk of this utility model includes an inner cylinder assembly; an adjustment assembly is fixed on the outer side of the port of the inner cylinder assembly, an outer cylinder assembly is rotatably arranged on the outer side of the inner cylinder assembly, and a base plate assembly is fixed on the outer side of the port of the outer cylinder assembly.

[0007] An elastic component is provided on the side opposite to the base plate assembly of the outer cylinder assembly, and the working end of the elastic component is connected to the outer wall of the inner cylinder assembly opposite to the adjustment component.

[0008] The substrate assembly and the adjustment assembly are arranged in parallel. A light source is provided on the side of the adjustment assembly opposite to the substrate assembly, and the adjustment assembly can block the light source from shining directly on the substrate assembly.

[0009] Preferably, the outer cylinder assembly includes a rotating cylinder, the inner wall of which is provided with an annular limiting groove for limiting the position, a first fixing groove is provided on the outer side of the port of the rotating cylinder opposite to the adjustment component, and the base plate assembly is fixed in the first fixing groove, the inner wall of the port of the rotating cylinder and the first fixing groove are evenly distributed with toothed grooves, and the elastic component is installed on the opposite end of the rotating cylinder and the base plate assembly.

[0010] Preferably, the inner cylinder assembly includes a fixed cylinder, a second fixing groove is provided on the outer side of the port of the fixed cylinder, and the adjusting assembly is fixed in the second fixing groove. Limiting teeth are evenly distributed on the outer wall of the fixed cylinder.

[0011] Preferably, the limiting teeth are all located inside the outer cylinder assembly and are slidably fitted in the tooth groove. The outer wall of the fixed cylinder is provided with a limiting rib ring for limiting, and the limiting rib ring can slide in the annular limiting groove along the center line of the rotating cylinder.

[0012] Preferably, the adjustment component includes an inner ring and an outer ring. The inner ring is fixed in the second fixing groove and is located inside the annular side of the outer ring. Connecting rods are evenly distributed and fixed between the inner ring and the outer ring, and each connecting rod is provided with a light-shielding plate. The area of ​​the light-shielding plate is smaller than the spacing of the reflective coating.

[0013] Preferably, the elastic component includes a fixing ring, which is rotatably mounted on the outer wall of the fixed cylinder opposite to the second fixing groove. Elastic plates are evenly distributed and fixed to the side of the fixing ring facing the second fixing groove, and the working end of the elastic plate is fixed to the end of the rotating cylinder opposite to the first fixing groove.

[0014] Preferably, the substrate assembly includes a glass substrate, on which a reflective coating is uniformly distributed on the sidewall facing the adjustment component, and the reflective coating faces the light shield and is blocked by the light shield. A protective film is adhered to the outer wall of the glass substrate, and the reflective coating is wrapped inside the protective film. A side sleeve is provided on the outer annular side of the glass substrate. The protective film is made of fluoride material, and the side sleeve is made of soft rubber.

[0015] The advantages of this utility model are:

[0016] 1. This utility model rotates the rotating drum, causing the substrate assembly to rotate, so that the reflective coating and the light shield are misaligned. This increases the frequency of light irradiation received by the photoelectric sensor. As the frequency of irradiation received by the photoelectric sensor increases, its measurement accuracy becomes more refined, thereby adjusting the accuracy of the code disk.

[0017] 2. This utility model protects the glass substrate and reflective coating with a protective film to prevent the glass substrate surface from being scratched. In addition, by setting a side sleeve on the side of the glass substrate and wrapping the protective film inside the side sleeve, the glass substrate is prevented from breaking due to impact, thus improving the protective effect. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the first three-dimensional structure in Embodiment 1;

[0020] Figure 2 This is an enlarged cross-sectional view of the main structure of the inner cylinder assembly in Embodiment 1;

[0021] Figure 3 This is a cross-sectional enlarged schematic diagram of the main structure of the adjustment component in Embodiment 1;

[0022] Figure 4 This is a cross-sectional enlarged schematic diagram of the main installation structure of the outer cylinder assembly and the elastic assembly in Embodiment 1;

[0023] Figure 5 This is an enlarged schematic diagram of area A in the cross-sectional view of the main installation structure of the outer cylinder assembly and the elastic assembly in Embodiment 1;

[0024] Figure 6 This is an enlarged cross-sectional view of the main structure of the substrate assembly in Example 2.

[0025] In the diagram: 1. Outer cylinder assembly; 11. Rotating cylinder; 12. Annular limiting groove; 13. Toothed groove; 14. Fixing groove No. 1;

[0026] 2. Substrate assembly; 21. Glass substrate; 22. Protective film; 23. Reflective coating; 24. Edge sleeve;

[0027] 3. Inner cylinder assembly; 31. Fixed cylinder; 32. Second fixing groove; 33. Limiting rib ring; 34. Limiting tooth;

[0028] 4. Adjustment assembly; 41. Inner ring; 42. Outer ring; 43. Connecting rod; 44. Sunshade plate;

[0029] 5. Elastic component; 51. Fixing ring; 52. Elastic plate. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] Example 1

[0032] Please see Figure 1-5 As shown, a reflective encoder includes an inner cylinder assembly 3; an adjustment assembly 4 is fixed to the outer side of the port of the inner cylinder assembly 3, an outer cylinder assembly 1 is rotatably disposed on the outer side of the inner cylinder assembly 3, and a base plate assembly 2 is fixed to the outer side of the port of the outer cylinder assembly 1.

[0033] An elastic component 5 is provided on the side opposite to the base plate component 2 of the outer cylinder assembly 1, and the working end of the elastic component 5 is connected to the outer wall of the inner cylinder assembly 3 opposite to the adjusting component 4.

[0034] The substrate assembly 2 and the adjustment assembly 4 are arranged in parallel. The adjustment assembly 4 has a light source on the side opposite to the substrate assembly 2, and the adjustment assembly 4 can block the light source from shining directly on the substrate assembly 2.

[0035] The outer cylinder assembly 1 includes a rotating cylinder 11. An annular limiting groove 12 for limiting the position is provided on the inner wall of the rotating cylinder 11. A first fixing groove 14 is provided on the outer side of the port of the rotating cylinder 11 opposite to the port of the adjusting assembly 4. The base plate assembly 2 is fixed in the first fixing groove 14. Gear grooves 13 are evenly distributed on the inner wall of the port of the rotating cylinder 11 and the first fixing groove 14 at the same end. The elastic component 5 is installed at the end of the rotating cylinder 11 opposite to the base plate assembly 2.

[0036] The inner cylinder assembly 3 includes a fixed cylinder 31, a second fixing groove 32 is provided on the outer side of the port of the fixed cylinder 31, and the adjusting assembly 4 is fixed in the second fixing groove 32. Limiting teeth 34 are evenly distributed on the outer wall of the fixed cylinder 31.

[0037] The limiting teeth 34 are all located inside the outer cylinder assembly 1 and are slidably fitted in the tooth groove 13. The outer wall of the fixed cylinder 31 is provided with a limiting rib ring 33 for limiting, and the limiting rib ring 33 can slide in the annular limiting groove 12 along the center line direction of the rotating cylinder 11.

[0038] The adjustment component 4 includes an inner ring 41 and an outer ring 42. The inner ring 41 is fixed in the second fixing groove 32 and is located on the inner side of the outer ring 42. Connecting rods 43 are evenly distributed and fixed between the inner ring 41 and the outer ring 42, and each connecting rod 43 is provided with a light-shielding plate 44. The area of ​​the light-shielding plate 44 is smaller than the spacing of the reflective coating 23.

[0039] The elastic component 5 includes a fixing ring 51, which is rotatably mounted on the outer wall of the fixed cylinder 31 opposite to the second fixing groove 32. Elastic plates 52 are evenly distributed and fixed to the side of the fixing ring 51 facing the second fixing groove 32, and the working end of the elastic plate 52 is fixed to the end of the rotating cylinder 11 opposite to the first fixing groove 14.

[0040] During operation, the fixed spacing of the reflective coating on the existing glass code disk results in a fixed measurement accuracy, which cannot be adjusted according to the usage requirements. When it is necessary to change the measurement accuracy, it is necessary to replace the code disk with one of different accuracy, which limits the scope of application. In this solution, by fixing the fixed cylinder 31 on the rotating shaft, the elastic plate 52 will push the rotating cylinder 11 to the side opposite to the fixed ring 51 in the initial state, so that the rotating cylinder 11 is sleeved on the end of the fixed cylinder 31 where the limiting tooth 34 is provided, and the limiting tooth 34 is fitted into the tooth groove 13, and the limiting rib ring 33 is attached to the side wall of the annular limiting groove 12 opposite to the substrate assembly 2.

[0041] When the rotating shaft rotates, it will drive the fixed cylinder 31 to rotate. Under the interlocking action of the limiting tooth 34 and the tooth groove 13, when the fixed cylinder 31 rotates, it will drive the rotating cylinder 11 to rotate as well, thereby driving the adjusting component 4 and the substrate component 2 to rotate synchronously. At this time, if the light shield 44 is facing the reflective coating 23, the light emitted by the light source will be blocked by the light shield 44 and will not shine on the reflective coating 23. After passing through the gap of the light shield 44, the light will directly penetrate the substrate component 2 and shine on the photoelectric sensor. At this time, the detection accuracy of the code disk is the same as the frequency of the light passing through the light shield 44 and shining on the photoelectric sensor, and the frequency of the photoelectric sensor receiving illumination is low.

[0042] When the measurement accuracy needs to be adjusted, the rotating cylinder 11 is pulled, causing the substrate assembly 2 to move away from the adjusting assembly 4. At this time, the toothed groove 13 at the end of the rotating cylinder 11 will move away from the limiting tooth 34, and the rotating cylinder 11 will press the elastic plate 52 towards the fixing ring 51 to make it contract, thereby releasing the restriction on the rotating cylinder 11. At this time, the rotating cylinder 11 can be rotated, causing the substrate assembly 2 to rotate, so that the reflective coating 23 is misaligned with the light shield 44. At this time, the light emitted by the light source will shine on the reflective coating 23 after passing through the gap of the light shield 44. The reflective coating 23 reflects the light. Under the further obstruction, the area of ​​light irradiated through the substrate assembly 2 is reduced and the light irradiation distance is increased. At this time, the data received by the photoelectric sensor will change. When the light shield 44 and the reflective coating 23 are completely misaligned, the light emitted by the light source will be blocked by both the light shield 44 and the reflective coating 23. The light can only pass through the gap between the light shield 44 and the reflective coating 23. At this time, the area of ​​light irradiation will be reduced again, and the frequency of light irradiation received by the photoelectric sensor will increase. When the frequency of light irradiation received by the photoelectric sensor increases, its measurement accuracy will be more refined, thereby achieving the adjustment of the code disk accuracy.

[0043] This combination effectively adjusts the measurement accuracy of the code disk, improves the applicability of the code disk's accuracy, avoids increased procurement costs due to large-scale purchases, and saves production costs.

[0044] Example 2

[0045] Please see Figure 6 As shown, the substrate assembly 2 includes a glass substrate 21. A reflective coating 23 is evenly distributed on the side wall of the glass substrate 21 facing the adjustment assembly 4. The reflective coating 23 faces the light shield 44 and is blocked by the light shield 44. A protective film 22 is bonded to the outer wall of the glass substrate 21, and the reflective coating 23 is wrapped inside the protective film 22. A side sleeve 24 is provided on the outer annular side of the glass substrate 21. The protective film 22 is made of fluoride material, and the side sleeve 24 is made of soft rubber.

[0046] During operation, since the reflective code disk is made of glass, and glass has defects such as being fragile and easily worn, the detection accuracy will be affected if the glass carrier is broken or scratched. In this solution, a protective film 22 is set on the outside of the substrate assembly 2 to protect the glass substrate 21 and the reflective coating 23, so as to prevent the surface of the glass substrate 21 from being scratched. In addition, a side sleeve 24 is set on the side of the glass substrate 21, and the side sleeve 24 wraps the protective film 22 inside to prevent the glass substrate 21 from breaking due to impact, thus improving the protection effect.

[0047] This combination effectively protects the code disk, preventing wear and tear on the glass carrier from affecting measurement accuracy.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A reflective code disk, characterized in that: It includes an inner cylinder assembly (3); an adjustment assembly (4) is fixed to the outside of the port of the inner cylinder assembly (3), an outer cylinder assembly (1) is rotatably disposed on the outside of the inner cylinder assembly (3), and a base plate assembly (2) is fixed to the outside of the port of the outer cylinder assembly (1). An elastic component (5) is provided on the side opposite to the base plate assembly (2) of the outer cylinder assembly (1), and the working end of the elastic component (5) is connected to the outer wall of the inner cylinder assembly (3) opposite to the adjustment component (4). The substrate assembly (2) and the adjustment assembly (4) are arranged in parallel. The adjustment assembly (4) has a light source on the side opposite to the substrate assembly (2), and the adjustment assembly (4) can block the light source from shining directly on the substrate assembly (2).

2. The reflective code disk according to claim 1, characterized in that: The outer cylinder assembly (1) includes a rotating cylinder (11). An annular limiting groove (12) for limiting is provided on the inner wall of the rotating cylinder (11). A first fixing groove (14) is provided on the outer side of the port of the rotating cylinder (11) opposite to the port of the adjusting assembly (4). The base plate assembly (2) is fixed in the first fixing groove (14). Gear grooves (13) are evenly distributed on the inner wall of the port of the rotating cylinder (11) and the first fixing groove (14). The elastic component (5) is installed on the opposite end of the rotating cylinder (11) and the base plate assembly (2).

3. A reflective code disk according to claim 1, characterized in that: The inner cylinder assembly (3) includes a fixed cylinder (31), a second fixing groove (32) is provided on the outer side of the port of the fixed cylinder (31), and the adjustment assembly (4) is fixed in the second fixing groove (32). Limiting teeth (34) are evenly distributed on the outer wall of the fixed cylinder (31).

4. A reflective code disk according to claim 3, characterized in that: The limiting teeth (34) are all located inside the outer cylinder assembly (1) and are slidably fitted in the tooth groove (13). The outer wall of the fixed cylinder (31) is provided with a limiting rib ring (33) for limiting, and the limiting rib ring (33) can slide in the annular limiting groove (12) along the center line direction of the rotating cylinder (11).

5. A reflective code disk according to claim 1, characterized in that: The adjustment component (4) includes an inner ring (41) and an outer ring (42). The inner ring (41) is fixed in the second fixing groove (32). The inner ring (41) is located on the inner side of the outer ring (42). Connecting rods (43) are evenly distributed and fixed between the inner ring (41) and the outer ring (42). Each connecting rod (43) is provided with a light shield (44). The area of ​​the light shield (44) is smaller than the spacing of the reflective coating (23).

6. A reflective code disk according to claim 1, characterized in that: The elastic component (5) includes a fixing ring (51), which is rotatably mounted on the outer wall of the fixed cylinder (31) opposite to the second fixing groove (32). Elastic plates (52) are evenly distributed and fixed to the side of the fixing ring (51) facing the second fixing groove (32), and the working end of the elastic plate (52) is fixed to the end of the rotating cylinder (11) opposite to the first fixing groove (14).

7. A reflective code disk according to claim 1, characterized in that: The substrate assembly (2) includes a glass substrate (21). A reflective coating (23) is evenly distributed on the side wall of the glass substrate (21) facing the adjustment assembly (4). The reflective coating (23) faces the light shield (44) and is blocked by the light shield (44). A protective film (22) is bonded to the outer wall of the glass substrate (21), and the reflective coating (23) is wrapped in the protective film (22). A side sleeve (24) is provided on the outer annular side of the glass substrate (21). The protective film (22) is made of fluoride material, and the side sleeve (24) is made of soft rubber.

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