Step resistor and replaceable accessories identification device

Abstract

The present invention discloses a step-type rheostat and a replaceable accessory identification device. The replaceable accessory identification device includes a resistive stroke identification device. Specific positions of different replaceable accessories are set at different heights. When the replaceable accessories are installed on the equipment, each specific position causes the slider of the resistive stroke identification device to retract by a different stroke. The replaceable accessory is then identified based on the stroke signal generated by the resistive stroke identification device. Compared to pressure sensors, the use of a step-type rheostat and a resistive stroke identification device offers greater stability and a longer service life.

Description

Technical Field

[0001] The present invention relates to the technical field of varistors, in particular to a step-type varistor.

[0002] The present invention relates to the technical field of stroke identification, and in particular to a resistive stroke identification device.

[0003] The present invention relates to the technical field of accessory identification, and in particular to a replaceable accessory identification device. Background Art

[0004] Among existing technologies for identifying interchangeable parts, one method relies on the amount of indentation caused by the installed accessory. Because different accessories cause the slider to indent differently, this indentation can be converted into an electrical signal for identification. Currently, this indentation is converted into an electrical signal by compressing an elastic member with the slider. This elastic member then applies pressure to a pressure sensor, which then outputs a pressure signal. This pressure signal is then identified to identify the interchangeable part. However, pressure sensors suffer from poor stability and a short service life. Summary of the Invention

[0005] The object of the present invention is to provide a replaceable accessory identification device with a simple structure, good stability and long service life.

[0006] The present invention provides a replaceable accessory identification device, including a resistive stroke identification device, which sets the specific positions of different replaceable accessories to different heights. When the replaceable accessories are installed on the equipment, each specific position causes the slider of the resistive stroke identification device to produce a different stroke indentation, and the replaceable accessory is identified based on the stroke signal generated by the resistive stroke identification device.

[0007] The beneficial effects of the present invention are: compared with the pressure sensor, the resistance-type stroke identification device has better stability and longer service life.

[0008] Furthermore, the resistive stroke identification device includes the above-mentioned step-type resistor and a resistance detection unit, and the resistance detection unit determines the sliding stroke of the slider on the step-type resistor by detecting the resistance between two electrical connection points on the step-type resistor.

[0009] The beneficial effect of adopting the above further solution is that: by using a step-type variable resistor, the resistance has only a few fixed gears, which reduces the difficulty of resistance identification.

[0010] Furthermore, the step-type variable resistor includes a PCB board and a slider sliding along the surface of the PCB board;

[0011] The PCB board is provided with a row of conductive contacts on its surface, and two electrical connection points are also provided on the PCB board; each of the conductive contacts is connected to a resistor in a one-to-one correspondence, and each of the resistors has a different resistance value; the two resistors corresponding to two adjacent conductive contacts are connected to different electrical connection points;

[0012] The slider is provided with a conductive member, which is used to slide along with the slider and electrically connect two adjacent conductive contacts in sequence during the sliding.

[0013] The beneficial effects of adopting the above further solution are: the overall structure of the step-type variable resistor is simple and reasonable, and the volume is small. The cost of using commonly used industrial resistors and PCB boards is low, and the overall cost is low.

[0014] Furthermore, the resistance values ​​corresponding to the conductive contacts gradually increase or decrease in sequence.

[0015] The beneficial effect of adopting the above further solution is that it is easy to remember because it is orderly.

[0016] Furthermore, it also includes a shell, the PCB board is fixed in the shell, and a sliding cavity adapted to the slider is formed in the shell; the slider slides in the sliding cavity.

[0017] The beneficial effects of adopting the above further solution are: the overall structure is simple and reasonable and easy to assemble.

[0018] Furthermore, a through hole is opened on the top of the sliding cavity and is communicated with the outside of the shell, and a protrusion is raised on the upper end of the sliding block and is adapted to the through hole.

[0019] The beneficial effect of adopting the above further solution is that the shell is sealed inside and outside, which is convenient for waterproofing and dustproofing.

[0020] Furthermore, it also includes an elastic member, one end of which is against the bottom of the sliding cavity and the other end is against the lower surface of the sliding block.

[0021] The beneficial effect of adopting the above further solution is that, for the slider to rebound, the component that compresses the slider can be separated from the slider.

[0022] Furthermore, the shell includes a bottom cover and a top shell fixed to each other by screws, and the inner side wall of the top shell protrudes inward to have an installation groove adapted for installing the PCB board. The PCB board is installed in the installation groove, and one side of the PCB board and the inner surface of the top shell form the sliding cavity.

[0023] The beneficial effects of adopting the above further solution are: the overall structure is simple and reasonable, and it is easy to assemble.

[0024] Furthermore, the conductive part includes two spring pins; the slider has a mounting hole, and the two spring pins are fixed in the mounting hole by a fixing frame; the two spring pins are electrically connected to each other; and the telescopic sections of the two spring pins extend out of the mounting hole and rest against the PCB board.

[0025] The beneficial effect of adopting the above further solution is that the elasticity of the spring pin avoids the problem of poor contact between the PCB board and the conductive part due to wear and tear, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an appearance diagram of the present invention.

[0027] Figure 2 This is a cross-sectional view of the slider at the uppermost end in the present invention.

[0028] Figure 3 This is a cross-sectional view of the slider at the lower end of the present invention.

[0029] Figure 4 It is an exploded view of the present invention.

[0030] Figure 5 This is a three-dimensional diagram of the present invention after removing the top shell.

[0031] Figure 6 It is a structural schematic diagram of the PCB board in the present invention.

[0032] Figure 7 Schematic diagram of the circuit of the PCB board in the present invention.

[0033] Figure 8 Schematic diagram of a conductive member electrically connecting two adjacent conductive contacts in the present invention.

[0034] Figure 9 This is a three-dimensional diagram of the mounting hole and the fixing bracket in the present invention being disassembled from each other.

[0035] Figure 10 This is a three-dimensional diagram of the fixing bracket of the present invention installed in the mounting hole.

[0036] Figure 11 This is a schematic diagram of the connection between the resistance detection unit and the PCB board in the present invention. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the embodiments.

[0038] like Figures 1 to 11As shown, this embodiment discloses a replaceable accessory identification device, including a resistive stroke identification device. Specific positions for different replaceable accessories are set at different heights. When the replaceable accessory is installed on the device, each specific position causes the slider 2 of the resistive stroke identification device to retract by a different amount. The replaceable accessory is then identified based on the stroke signal generated by the resistive stroke identification device. Compared to pressure sensors, the resistive stroke identification device offers greater stability and a longer service life.

[0039] The resistive travel identification device includes the aforementioned step-type rheostat and a resistance detection unit 8. The resistance detection unit 8 determines the sliding travel of the slider 2 on the step-type rheostat by detecting the resistance between two electrical connection points 12 on the step-type rheostat. Using a step-type rheostat, the resistance has only a few fixed levels, which reduces the difficulty of resistance identification.

[0040] The step-type variable resistor includes a PCB board 1 and a slider 2 that slides along the surface of the PCB board 1. The PCB board 1 is provided with a row of conductive contacts 11 and two electrical connection points 12. Each conductive contact 11 is connected to a resistor 13, each resistor 13 having a different resistance value. The two resistors 13 corresponding to two adjacent conductive contacts 11 are connected to different electrical connection points 12. The slider 2 is provided with a conductive member that slides with the slider 2 and sequentially electrically connects two adjacent conductive contacts 11 during the sliding process. The step-type variable resistor has a simple and reasonable overall structure, is compact, and uses commonly used industrial resistors and PCB boards, which are relatively inexpensive, resulting in a low overall cost.

[0041] The resistance value of the resistor 13 corresponding to each of the conductive contacts 11 gradually increases or decreases in sequence. Because it is orderly, it is easy to remember. It also includes a shell, the PCB board 1 is fixed in the shell, and a sliding cavity adapted to the slider 2 is formed in the shell; the slider 2 slides in the sliding cavity. The overall structure is simple and reasonable. It is convenient to assemble. A through hole that passes through the outside of the shell is opened on the top of the sliding cavity, and a protrusion that adapts to the through hole is raised on the upper end of the slider 2. The shell is sealed inside and outside, which is convenient for waterproofing and dustproofing. It also includes an elastic member 3, one end of the elastic member 3 is against the bottom of the sliding cavity, and the other end is against the lower surface of the slider 2. For the slider rebound, the component that compresses the slider 2 can be separated from the slider 2.

[0042] The housing includes a bottom cover 4 and a top shell 5 fixed to each other by screws. The inner sidewall of the top shell 5 has an inwardly protruding mounting groove adapted to accommodate the PCB board 1. The PCB board 1 is installed in the mounting groove. One side of the PCB board 1 and the inner surface of the top shell 5 form the sliding cavity. The overall structure is simple and reasonable, and easy to assemble.

[0043] The conductive member includes two spring pins 6. The slider 2 defines a mounting hole, and the two spring pins 6 are secured within the mounting hole by a fixing bracket 7. The two spring pins 6 are electrically connected to each other, and the telescopic sections of the two spring pins 6 extend out of the mounting hole and abut against the PCB 1. The elasticity of the spring pins 6 prevents poor contact between the PCB 1 and the conductive member due to wear, thereby extending their service life.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Step resistor, characterized in that It comprises a PCB board (1) and a slider (2) sliding along the surface of the PCB board (1); A row of conductive contacts (11) is provided on the surface of the PCB board (1), and two electrical connection points (12) are also provided on the PCB board (1); each of the conductive contacts (11) is connected to a resistor (13) in a one-to-one correspondence, and each of the resistors (13) has a different resistance value; the two resistors (13) corresponding to two adjacent conductive contacts (11) are connected to different electrical connection points (12); The slider (2) is provided with a conductive member, which is used to slide along with the slider (2) and electrically connect two adjacent conductive contacts (11) in sequence during the sliding.

2. The step resistor according to claim 1, characterized in that The resistance values ​​of the resistors (13) corresponding to the conductive contacts (11) gradually increase or decrease in sequence.

3. The step resistor according to claim 1, characterized in that It also includes a housing, the PCB board (1) is fixed in the housing, and a sliding cavity adapted to the slider (2) is formed in the housing; the slider (2) slides in the sliding cavity.

4. The step resistor according to claim 3, characterized in that A through hole is formed on the top of the sliding cavity and is communicated with the outside of the housing. A convex block is formed on the upper end of the sliding block (2) and is adapted to fit the through hole.

5. The step resistor according to claim 4, characterized in that: It also includes an elastic member (3), one end of the elastic member (3) abuts against the bottom of the sliding cavity, and the other end abuts against the lower surface of the sliding block (2).

6. The step resistor according to claim 3, characterized in that The housing comprises a bottom cover (4) and a top shell (5) fixed to each other by screws. The inner side wall of the top shell (5) protrudes inwardly to form a mounting groove adapted for mounting the PCB board (1). The PCB board (1) is mounted in the mounting groove, and one side of the PCB board (1) and the inner surface of the top shell (5) form the sliding cavity.

7. The step resistor according to claim 1, characterized in that The conductive member comprises two spring pins (6); the slider (2) is provided with a mounting hole, and the two spring pins (6) are fixed in the mounting hole by a fixing frame (7); the two spring pins (6) are electrically connected to each other; and the telescopic sections of the two spring pins (6) extend out of the mounting hole and abut against the PCB board (1).

8. A resistive stroke identification device, characterized in that: The invention comprises a step-type variable resistor as claimed in any one of claims 1 to 7 and a resistance detection unit (8), wherein the resistance detection unit (8) determines the sliding stroke of the slider (2) by detecting the resistance between two electrical connection points (12).

9. A replaceable accessory identification device, characterized in that: The device comprises a resistive stroke identification device as claimed in claim 8, wherein specific positions of different replaceable accessories are set at different heights, and when the replaceable accessories are installed on the device, each specific position causes the slider (2) to retract with a different stroke, and the replaceable accessory is identified based on the stroke signal generated by the resistive stroke identification device.

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