Flexible circuit installation structure of grating ruler

Abstract

The utility model belongs to the technical field of measuring equipment, and particularly relates to a flexible circuit mounting structure of a grating ruler, which comprises a ruler body, grating glass and a flexible circuit, the grating glass is arranged in the ruler body, the ruler body is connected with a grating reading head in a sliding manner, and the grating reading head can prevent the flexible circuit and the ruler body from being scratched. The grating reading head comprises a tackle and a reading support, the tackle is connected to the ruler body in a sliding mode, the reading support is arranged on the outer side of the tackle, and a flexible circuit is arranged on the tackle. The distance between the flexible circuit and the ruler body is limited, so that the phenomenon that the flexible circuit is scratched with the inner wall of the ruler body due to dragging can be avoided, the phenomenon that the flexible circuit is abraded or does not work can be avoided, and the use stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to a flexible circuit installation structure of a grating ruler. Background Art

[0002] The grating ruler is a high-resolution photoelectric sensor that uses the grating principle to measure length or displacement. It consists of a light source, a grating, a probe, a signal processing circuit, etc.

[0003] The grating ruler is a common measuring device that uses optical principles to achieve high-precision length measurement. Its principle is based on the interference phenomenon of light and the working principle of the sensor. The value of the measured length is obtained by measuring the interference signal of light. The grating ruler consists of grating glass and a receiver. Its working principle can be simply described as the following steps:

[0004] 1. Emitting light source: The grating ruler uses an infrared LED light source as the emitting light source.

[0005] 2. Grating diffraction: When the emitted light beam hits the grating glass, the transparent stripes on the grating will cause the light to diffract, and an interference pattern will be formed based on this characteristic.

[0006] 3. Interference signal: The light beam of the interference pattern will be fed back to the receiver, and the photoelectric sensor of the receiver will convert the optical signal into an electrical signal for collection and processing.

[0007] 4. Signal processing: The receiver amplifies, filters and digitizes the collected electrical signals to accurately reflect the changes in the measured length.

[0008] However, when the existing grating ruler is in operation, when the grating reading head moves on the ruler body, there will be a phenomenon of pulling on the flexible circuit. At this time, the pulled flexible circuit will scratch the inner wall of the ruler body, which will easily cause the flexible circuit to wear out, short-circuit or stop working. Therefore, a flexible circuit installation structure of a grating ruler is invented. Utility Model Content

[0009] In view of the above-mentioned and / or existing problems in the flexible circuit installation structure of an existing grating ruler, the present utility model is proposed.

[0010] Therefore, the purpose of the utility model is to provide a flexible circuit installation structure for a grating ruler, which can solve the above-mentioned problem that the existing flexible circuit may scratch the inner wall of the ruler body through a limit assembly.

[0011] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0012] A flexible circuit installation structure of a grating ruler, comprising a ruler body, grating glass and a flexible circuit, wherein the grating glass is built into the ruler body, and a grating reading head is slidably connected to the ruler body to prevent the flexible circuit and the ruler body from being scratched;

[0013] The grating reading head includes a pulley and a reading bracket. The ruler body is slidably connected to the pulley. The outer side of the pulley is provided with a reading bracket. The pulley is provided with a flexible circuit. A limit assembly is provided between the opposite ends of the flexible circuit and the reading bracket.

[0014] As a preferred solution of the flexible circuit installation structure of a grating ruler described in the utility model, the limiting assembly includes a first spring and a second spring, one end of the first spring is fixedly mounted on the inner surface of the reading bracket, and the end of the first spring away from the reading bracket is in close contact with the flexible circuit.

[0015] As a preferred solution of the flexible circuit installation structure of a grating ruler described in the utility model, one end of the second spring is fixedly mounted on the reading bracket, and one end of the second spring away from the reading bracket is fixedly mounted on the pulley.

[0016] As a preferred solution of the flexible circuit installation structure of a grating ruler described in the utility model, wherein: the material of the ruler body is set to be aluminum alloy, so as to increase the service life of the ruler body.

[0017] Compared with existing technologies:

[0018] By setting a limit component, the distance between the flexible circuit and the ruler body can be limited. By limiting the distance between the flexible circuit and the ruler body, it can avoid the flexible circuit from being scratched against the inner wall of the ruler body due to entanglement, thereby avoiding the flexible circuit from being worn or malfunctioning, and improving the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic cross-sectional view of the structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-section of the structure of the utility model.

[0022] In the figure: ruler body 1, grating glass 2, pulley 3, first spring 4, second spring 5, reading bracket 6, flexible circuit 7. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] The utility model provides a flexible circuit installation structure for grating ruler, please refer to Figure 1-Figure 3 , including a ruler body 1, a grating glass 2 and a flexible circuit 7, wherein the grating glass 2 is built into the ruler body 1, and a grating reading head is slidably connected to the ruler body 1 to prevent the flexible circuit 7 and the ruler body 1 from being scratched, wherein the material of the ruler body 1 is set to be aluminum alloy to increase the service life of the ruler body 10. By setting the material of the ruler body 1 to be aluminum alloy, the anti-corrosion and anti-aging properties and the bending resistance of the ruler body 1 can be improved.

[0025] The grating reading head includes a pulley 3 and a reading bracket 6. The pulley 3 is slidably connected to the ruler body 1. The reading bracket 6 is provided on the outer side of the pulley 3. The pulley 3 is provided with a flexible circuit 7. A limit assembly is provided between the flexible circuit 7 and the opposite ends of the reading bracket 6.

[0026] The limiting assembly includes a first spring 4 and a second spring 5, one end of the first spring 4 is fixedly mounted on the inner surface of the reading bracket 6, and the end of the first spring 4 away from the reading bracket 6 is in close contact with the flexible circuit 7. Insulating paint can be applied on the surface of the first spring 4 as required to improve the insulation performance of the first spring 4, one end of the second spring 5 is fixedly mounted on the reading bracket 6, and the end of the second spring 5 away from the reading bracket 6 is fixedly mounted on the pulley 3, and insulating paint can be applied on the surface of the second spring 5 as required to improve the insulation performance of the second spring 5.

[0027] Working principle: When the grating reading head moves along the ruler body 1, the distance between the flexible circuit 7 and the ruler body 1 is limited by the first spring 4 and the second spring 5 to prevent the flexible circuit 7 from scratching the inner wall of the ruler body due to entanglement.

[0028] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flexible circuit installation structure for a grating ruler, comprising a ruler body (1), a grating glass (2) and a flexible circuit (7), wherein the grating glass (2) is built into the ruler body (1), and characterized in that: The ruler body (1) is slidably connected with a grating reading head capable of preventing the flexible circuit (7) and the ruler body (1) from being scratched; The grating reading head comprises a pulley (3) and a reading bracket (6); the ruler body (1) is slidably connected to the pulley (3); the reading bracket (6) is arranged on the outer side of the pulley (3); a flexible circuit (7) is arranged on the pulley (3); and a limit assembly is arranged between the opposite ends of the flexible circuit (7) and the reading bracket (6).

2. The flexible circuit installation structure of a grating ruler according to claim 1, characterized in that: The limit assembly comprises a first spring (4) and a second spring (5), one end of the first spring (4) is fixedly mounted on the inner surface of the reading bracket (6), and one end of the first spring (4) away from the reading bracket (6) is in close contact with the flexible circuit (7).

3. The flexible circuit installation structure of a grating ruler according to claim 2, characterized in that: One end of the second spring (5) is fixedly mounted on the reading bracket (6), and one end of the second spring (5) away from the reading bracket (6) is fixedly mounted on the pulley (3).

4. The flexible circuit installation structure of a grating ruler according to claim 1, characterized in that: The material of the ruler body (1) is set to be aluminum alloy, so as to increase the service life of the ruler body (1).

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