Pressure sensing distance test fixture

Abstract

The utility model relates to the technical field of testing devices, and discloses a pressure sensing distance testing jig which comprises a positioning base and a pressing unit. The pressing unit is detachably matched with the positioning base so that the to-be-detected workpiece can be conveniently assembled or disassembled, the supporting part of the pressing unit abuts against the opening end of the containing groove, and the pressing piece of the pressing unit corresponds to the pressure sensing piece on the to-be-detected workpiece. If the pressing unit is installed on the positioning base, whether the pressure sensing distance of the pressure sensing piece is qualified or not can be detected through the pressing piece, and the pressing piece can move close to or away from the pressure sensing piece so that the pressing piece can be switched between the first position and the second position relative to the positioning base. The distance between the part, directly facing the pressure sensing piece, of the pressing piece and the root of the pressure sensing piece is switched between the first preset distance and the second preset distance, so that whether the pressure sensing distance of the pressure sensing piece meets the standard preset range or not is detected, manual data reading is not needed, the measuring method is simplified, operation is easy and convenient, and measuring time is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to test device technical field, concretely relates to pressure sensing distance test fixture. BACKGROUND

[0002] The pressure sensing piece is an important component on the electric toothbrush, and is arranged on a printed circuit board (PCB). During use of the electric toothbrush, the circuit on the PCB corresponding to the pressure sensing piece is conducted by pressing the pressure sensing piece, so that the electric toothbrush works normally. In addition, a corresponding indicator lamp is usually arranged, which is turned on as a prompt when the circuit is conducted. After the electric toothbrush is assembled, the pressure sensing piece may not work properly, i.e. the electric toothbrush cannot be started by pressing the external button on the body or the electric toothbrush is started without pressing the external button. Therefore, the electric toothbrush needs to be disassembled for verification. The pressure sensing piece does not work properly mostly because the pressure sensing distance does not meet the standard. In the prior art, the actual pressure sensing distance is measured by using a height gauge to compare with the standard value to check whether it is qualified. However, since the pressure sensing piece is small in size, it is difficult to measure the pressure sensing distance, and the accuracy of one measurement is poor, and multiple measurements may be required. Therefore, the process of checking whether the pressure sensing distance is qualified is inconvenient and time-consuming and laborious. SUMMARY

[0003] Therefore, the utility model provides a pressure sensing distance test fixture to solve the problem that the process of checking whether the pressure sensing distance is qualified is inconvenient and time-consuming and laborious.

[0004] The utility model provides a pressure sensing distance test fixture, which comprises a positioning base, a receiving groove is formed in the positioning base, the receiving groove is suitable for matching the shape of a workpiece to be measured to fix the workpiece to be measured, a pressing unit is detachably matched with the positioning base, the pressing unit comprises a supporting part and a pressing piece, the supporting part abuts against an opening end of the receiving groove, the pressing piece is connected to the supporting part and is suitable for corresponding to a pressure sensing piece on the workpiece to be measured, the pressing piece moves relative to the positioning base and has a first position and a second position, when the pressing piece is located at the first position, the distance between the part of the pressing piece corresponding to the pressure sensing piece and the plate body of the workpiece to be measured is a first preset distance, when the pressing piece is located at the second position, the distance between the part of the pressing piece corresponding to the pressure sensing piece and the plate body of the workpiece to be measured is a second preset distance, the second preset distance is smaller than the first preset distance, and the pressing piece moves close to or away from the pressure sensing piece to switch between the second position and the first position.

[0005] Beneficial effects: by setting the pressing unit detachable with the positioning base, it is convenient to load or unload the workpiece to be tested, the workpiece to be tested is clamped between the pressing unit and the positioning base, the support part of the pressing unit is arranged to abut the opening end of the accommodating groove, the positioning base supports the pressing unit, the pressing part of the pressing unit corresponds to the pressure sensing part on the workpiece to be tested, and then the pressing unit is installed on the positioning base to realize the detection of the pressure sensing distance of the pressure sensing part through the pressing part, further, the pressing part is arranged to move close to or away from the pressure sensing part, so that the pressing part is switched between the first position and the second position relative to the positioning base, the distance between the part of the pressing part facing the pressure sensing part and the plate body of the workpiece to be tested is switched between the first preset distance and the second preset distance, so that the pressure sensing distance of the pressure sensing part is detected whether it meets the standard preset range, and in the whole test process, manual reading of data is not required, the measurement method is simplified, the operation is simple and convenient, and the measurement time is saved.

[0006] In an optional embodiment, the side wall of the accommodating groove has a support surface facing away from the bottom surface of the accommodating groove; the support part comprises a plate body and a leg connected with each other, the plate body abuts the support surface, and the leg extends into the accommodating groove, and the pressing part is connected to the plate body.

[0007] Beneficial effects: by arranging the plate body of the support part to abut the support surface on the side wall of the accommodating groove, the positioning base supports the support part, and by arranging the leg of the support part to extend into the accommodating groove and be clamped between the two side walls of the accommodating groove, the leg is limited, the stability of the assembly of the pressing unit and the positioning base is improved, the interference with the measurement result is reduced, and the measurement accuracy is ensured.

[0008] In an optional embodiment, the workpiece to be tested is a PCB board, the support part is movable relative to the positioning base along the extension direction of the accommodating groove, the pressing part is fixedly connected to the plate body, the end surface of the pressing part facing the workpiece to be tested is in a stepped shape, the stepped end surface comprises a first stepped surface and a second stepped surface arranged along the extension direction of the accommodating groove, and the distance between the first stepped surface and the body of the PCB board is greater than the distance between the second stepped surface and the body of the PCB board.

[0009] Beneficial effects: by setting the pressing piece fixedly connected on the plate body, the pressing piece and the supporting part are an integral whole, then the movement of the supporting part relative to the positioning base can drive the pressing piece to move along the extension direction of the accommodating groove, so as to realize that the first and second stepped surfaces on the end surface of the pressing piece correspond to the pressure sensing piece respectively, and by setting the distance between the first stepped surface and the body of the PCB greater than the distance between the second stepped surface and the body of the PCB, i.e. the first preset distance is greater than the second preset distance, by pushing the pressing unit to move along the extension direction of the accommodating groove, the first and second stepped surfaces correspond to the pressure sensing piece respectively, so that whether the height of the pressure sensing piece conforms to the standard preset range can be realized, i.e. the detection of whether the pressure sensing distance is qualified is completed, the structure is simple, the operation is convenient, and the accuracy is high.

[0010] In an alternative embodiment, a let-in part is arranged on the side wall of the accommodating groove, the plate body is movably placed in the let-in part, the bottom surface of the let-in part forms the supporting surface, the supporting surface is lower than the surface of the positioning base away from the bottom surface of the accommodating groove and higher than the bottom surface of the accommodating groove, and in the extension direction of the accommodating groove, the inner walls of the two ends of the let-in part form limiting surfaces, and the distance between the two limiting surfaces is greater than the length dimension of the plate body in the extension direction of the accommodating groove.

[0011] Beneficial effects: by arranging the let-in part on the side wall of the accommodating groove to cooperate with the plate body, on the one hand, the supporting surface formed by the bottom surface of the let-in part supports the plate body in the groove depth direction, and on the other hand, the side wall of the let-in part limits the plate body in the vertical direction to the groove depth direction, and further, the distance between the two inner walls of the two ends of the let-in part in the extension direction of the accommodating groove is greater than the dimension of the plate body in the extension direction of the accommodating groove, so that the movement of the plate body in the extension direction of the accommodating groove can be realized, thereby realizing the movement of the pressing unit between the first position and the second position, the structure is simple, the stability is good, and the reliability is high.

[0012] In an alternative embodiment, the workpiece to be detected is a movement core assembly, the movement core assembly includes a motor assembly, a PCB and an elastic piece, the elastic piece is supported between the motor assembly and the PCB, one end of the pressing piece away from the plate body abuts against one side of the motor assembly away from the PCB, and the pressing piece is adjustably connected on the plate body to change the distance between the motor assembly and the PCB.

[0013] Beneficial effects: by arranging the pressing piece to abut against the motor assembly and adjustably connecting the pressing piece on the plate body, the distance of the pressing piece extending out of the plate body in the groove depth direction is adjusted, the pressing piece is switched between the first position and the second position, the pressing piece presses the motor assembly in the groove depth direction, so that whether the pressure sensing distance conforms to the standard preset range can be realized, the operation is convenient, the accuracy is high, and the flexibility is good.

[0014] In an alternative embodiment, the plate body is provided with a first through hole, the pressing unit further comprises: a push block, the push block is arranged on the side of the plate body away from the positioning base, the push block is arranged spaced apart from the plate body, the push block is provided with a second through hole corresponding to the first through hole, the pressing piece passes through the first through hole and is connected with the push block through the second through hole; an adjusting piece, one end of the adjusting piece is connected with the plate body and the other end is connected with the push block, the adjusting piece is adapted to adjust the distance between the push block and the plate body.

[0015] Beneficial effect: by arranging the push block on the side of the plate body away from the positioning base, and arranging the adjusting piece between the push block and the plate body, the distance between the push block and the plate body is adjusted by the adjusting piece, so that the pressing piece connected with the push block is moved up and down relative to the plate body, that is, the distance of the pressing piece extending out of the plate body in the groove depth direction is adjusted, so that the pressing piece is switched between the first position and the second position.

[0016] In an alternative embodiment, the pressing piece comprises: a push rod, the push rod comprises a connected rod portion and a head portion, the cross-sectional area of the head portion is larger than that of the rod portion, the rod portion is movably arranged in the first through hole, and the head portion is located on the side of the plate body facing the PCB board; a locking portion, the locking portion is located on the side of the plate body away from the workpiece to be tested, the locking portion is detachably connected with the end of the rod portion away from the head portion, and one of the locking portion and the rod portion passes through the second through hole and is connected with the other.

[0017] Beneficial effect: by movably arranging the push rod of the pressing piece in the first through hole of the plate body, the relative position of the push rod and the plate body is facilitated to be adjusted, and by arranging one of the locking portion and the rod portion to pass through the second through hole and be connected with the other, the push rod is connected with the push block through the locking portion, and the locking portion is detachably connected with the rod portion, so that the disassembly is facilitated, the flexibility is high, and the use is convenient.

[0018] In an alternative embodiment, a fourth through hole is further formed in the push block, the fourth through hole is arranged spaced apart from the first through hole and the second through hole, and the pressing unit further comprises a positioning column, one end of the positioning column is connected with the plate body, and the push block is slidably sleeved on the positioning column through the fourth through hole.

[0019] Beneficial effect: by arranging the fourth through hole in the push block, the push block is sleeved on the positioning column connected with the plate body through the fourth through hole, the positioning column provides guidance for the installation of the push block and the relative movement between the push block and the plate body, and under the joint limitation of the adjusting piece and the positioning column, the radial positioning of the push block and the plate body is realized, which is beneficial to improve the stability of the structure.

[0020] In one optional embodiment, the number of adjusting members is at least two, the number of positioning posts is at least two, the adjusting members and the positioning posts are arranged alternately around the push rod in the circumferential direction.

[0021] Beneficial effects: By setting at least two adjusting components and two positioning pins, the stability and smoothness of the connection between the push block and the plate can be further improved. At the same time, by setting the adjusting components and positioning pins alternately and surrounding the push rod together, the uniformity of the distribution of the adjusting components and positioning pins is ensured, thereby improving the stability of the movement process during the relative movement of the adjusting push block and the plate.

[0022] In one alternative embodiment, the pressing unit further includes a scale mounted on the plate and adjacent to the push block to measure the movement distance of the push block.

[0023] Beneficial effects: By installing a scale adjacent to the push block on the plate, it is easy to read the distance the push block moves toward the plate, thereby facilitating the control of the change in the distance the push rod extends out of the plate and improving the accuracy of the measurement. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is an exploded view of a pressure-sensitive distance testing fixture before it is assembled with a PCB board, according to an embodiment of this utility model.

[0026] Figure 2 for Figure 1 The diagram shows the structure of the pressing unit in the pressure-sensitive distance testing fixture.

[0027] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0028] Figure 4 for Figure 1 The diagram shows the structure of the pressure-sensitive distance testing fixture after it is assembled with the PCB board and the pressing component is in the first position.

[0029] Figure 5 for Figure 4 The front view of the assembly drawing shown;

[0030] Figure 6 for Figure 5 a partial enlarged view of the middle B;

[0031] Figure 7 for Figure 1 the structure schematic view of the pressure sensing distance test fixture and the PCB board after being assembled and when the pressing piece is in the second position;

[0032] Figure 8 for Figure 7 the front view of the assembly drawing;

[0033] Figure 9 for Figure 8 a partial enlarged view of the middle C;

[0034] Figure 10 the exploded schematic view of another pressure sensing distance test fixture and the movement assembly before being assembled according to the embodiment of the utility model;

[0035] Figure 11 for Figure 10 the structure schematic view of the pressing unit in the pressure sensing distance test fixture;

[0036] Figure 12 for Figure 10 the structure schematic view of the pressing piece in the pressure sensing distance test fixture;

[0037] Figure 13 the structure schematic view of a push rod according to the embodiment of the utility model;

[0038] Figure 14 the structure schematic view of a push block according to the embodiment of the utility model;

[0039] Figure 15 for Figure 10 the assembly structure schematic view of the pressure sensing distance test fixture and the movement assembly when the locking piece is not installed;

[0040] Figure 16 for Figure 10 the assembly structure schematic view of the pressure sensing distance test fixture and the movement assembly;

[0041] Figure 17 for Figure 16 the structure schematic view of the assembly drawing hidden positioning base and movement support;

[0042] Figure 18 for Figure 17 the partial enlarged view of the middle D.

[0043] Explanation of reference signs:

[0044] 1, positioning base; 110, containing groove; 111, support surface; 112, let part; 2, pressing unit; 210, support part; 211, plate body; 212, support leg; 213, first through hole; 214, fifth through hole; 215, first mounting hole; 216, second mounting hole; 217, positioning hole; 220, pressing piece; 221, first stepped surface; 222, second stepped surface; 223, push rod; 2231, rod part; 2232, head part; 224, locking part; 225, locking hole; 230, push block; 231, second through hole; 232, third through hole; 233, fourth through hole; 240, adjusting piece; 250, positioning column; 260, scale; 270, locking piece; 310, PCB board; 301, pressure sensing piece; 302, plate body; 320, core assembly; 321, motor assembly; 322, elastic piece. DETAILED DESCRIPTION

[0045] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the drawings of the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0046] The embodiments of the present application will be described below in combination with Figures 1 to 18

[0047] According to the embodiments of the present application, a pressure sensing distance test fixture is provided, which comprises a positioning base 1 and a pressing unit 2. The positioning base 1 is provided with a containing groove 110, which is adapted to be matched with the shape of a workpiece to be tested, so as to fix the workpiece to be tested; the pressing unit 2 is detachably matched with the positioning base 1, and the pressing unit 2 comprises a support part 210 and a pressing piece 220, the support part 210 abuts at the opening end of the containing groove 110, the pressing piece 220 is connected to the support part 210 and is adapted to correspond to a pressure sensing piece 301 on the workpiece to be tested, and the pressing piece 220 has a first position and a second position relative to the positioning base 1; when the pressing piece 220 is located at the first position, the distance between the part of the pressing piece 220 directly opposite the pressure sensing piece 301 and a plate body 302 of the workpiece to be tested is a first preset distance; when the pressing piece 220 is located at the second position, the distance between the part of the pressing piece 220 directly opposite the pressure sensing piece 301 and the plate body 302 of the workpiece to be tested is a second preset distance, wherein the second preset distance is smaller than the first preset distance; the pressing piece 220 moves close to or away from the pressure sensing piece 301 to switch between the second position and the first position.

[0048] ​It should be noted that the workpiece to be tested at least includes the PCB 310, the PCB 310 includes a plate body 302 and a pressure sensing piece 301 arranged on the plate body 302, and the PCB 310 is further provided with a circuit and an indicator lamp corresponding to the pressure sensing piece 301, the indicator lamp is adapted to light up when the pressure sensing piece 301 is pressed, therefore, by arranging the pressing piece 220 corresponding to the pressure sensing piece 301, if the pressing piece 220 can contact the pressure sensing piece 301, the indicator lamp lights up, that is, whether the pressure sensing piece 301 is pressed can be judged by whether the indicator lamp lights up; the pressure sensing distance is usually set as a range value, if the actual pressure sensing distance is less than the range value or greater than the range value, it is determined that the pressure sensing is poor, the first preset distance and the second preset distance are not equal, one of the first position and the second position corresponds to detecting whether the pressure sensing distance of the pressure sensing piece 301 meets the standard pressure sensing distance maximum limit value, and the other corresponds to detecting whether the pressure sensing distance of the pressure sensing piece 301 meets the pressure sensing distance minimum limit value. Only when the pressure sensing distance is between the minimum limit value and the maximum limit value, it is determined that the pressure sensing distance is qualified.

[0049] The pressure sensing distance test fixture applied in the embodiment can be detachably matched with the positioning base 1 through the pressing unit 2, so as to facilitate the loading or unloading of the workpiece to be tested, the workpiece to be tested is clamped between the pressing unit 2 and the positioning base 1, the opening end of the accommodating groove 110 is abutted by the support part 210 of the pressing unit 2, the positioning base 1 supports the pressing unit 2, the pressing piece 220 of the pressing unit 2 corresponds to the pressure sensing piece 301 on the workpiece to be tested, and the pressing piece 220 on the pressing unit 2 can be installed on the positioning base 1 to detect whether the pressure sensing distance of the pressure sensing piece 301 is qualified, further, the pressing piece 220 can be moved close to or away from the pressure sensing piece 301, so that the pressing piece 220 is switched between the first position and the second position relative to the positioning base 1, the distance between the part of the pressing piece 220 directly opposite the pressure sensing piece 301 and the plate body 302 of the workpiece to be tested is switched between the first preset distance and the second preset distance, so as to detect whether the pressure sensing distance of the pressure sensing piece 301 meets the standard preset range, and manual reading of data is not required in the whole test process, the measurement method is simplified, the operation is simple, and the measurement time is saved.

[0050] In one embodiment, the side wall of the accommodating groove 110 has a support surface 111 facing away from the bottom surface of the accommodating groove 110; the support part 210 includes a plate body 211 and a support leg 212 connected to each other, the plate body 211 abuts against the support surface 111, the support leg 212 extends into the accommodating groove 110, and the pressing piece 220 is connected to the plate body 211. Wherein, the support surface 111 faces the bottom surface of the accommodating groove 110, and the support leg 212 is arranged on the side wall of the accommodating groove 110. Figure 1The direction of the arrowhead "up" is along the groove depth and away from the groove bottom. By setting the plate body 211 of the support part 210 in abutment with the support surface 111 on the side wall of the accommodating groove 110, the positioning base 1 supports the support part 210, and by setting the support leg 212 of the support part 210 to extend into the accommodating groove 110, the support leg 212 is clamped between the two side walls of the accommodating groove 110, the positioning of the support part 210 is achieved, the stability of the assembly of the pressing unit 2 and the positioning base 1 is improved, thereby reducing the interference with the measurement result and ensuring the measurement accuracy.

[0051] In one embodiment, further in combination with Figures 1 to 9 As shown, the workpiece to be measured is a PCB board 310, the support part 210 can move relative to the positioning base 1 along the extension direction of the accommodating groove 110, the pressing piece 220 is fixedly connected to the plate body 211, and the end face of the pressing piece 220 facing the workpiece to be measured is in a stepped shape, the stepped end face includes a first stepped surface 221 and a second stepped surface 222 arranged along the extension direction of the accommodating groove 110, and the distance between the first stepped surface 221 and the body of the PCB board 310 is greater than the distance between the second stepped surface 222 and the body of the PCB board 310. It should be noted that for the case of the workpiece to be measured being the PCB board 310, the required detection pressure sensing distance is the height of the protruding part on the pressure sensing piece 301 itself, and the distance between the part of the pressing piece 220 facing the pressure sensing piece 301 and the root of the pressure sensing piece 301 is the distance between the part of the pressing piece 220 facing the pressure sensing piece 301 and the plate body 302 of the PCB board 310. Among them, the distance between the first stepped surface 221 and the body of the PCB board 310 is the first preset distance, and the distance between the second stepped surface 222 and the body of the PCB board 310 is the second preset distance; the extension direction of the accommodating groove 110 refers to Figure 1 The direction of the arrowhead "length" is the first position and the second position arranged along the extension direction of the accommodating groove 110.

[0052] By fixing the pressing component 220 to the plate 211, and making the pressing component 220 and the support 210 a whole, the pressing component 220 can be moved along the extension direction of the receiving groove 110 by the movement of the support 210 relative to the positioning base 1. This allows the first stepped surface 221 and the second stepped surface 222 on the end face of the pressing component 220 to correspond to the pressure-sensitive component 301. At the same time, by setting the distance between the first stepped surface 221 and the body of the PCB board 310 to be greater than the distance between the second stepped surface 222 and the body of the PCB board 310, i.e., the first preset distance is greater than the second preset distance, by pushing the pressing unit 2 to move along the extension direction of the receiving groove 110, so that the first stepped surface 221 and the second stepped surface 222 correspond to the pressure-sensitive component 301, it is possible to detect whether the height of the pressure-sensitive component 301 meets the standard preset range, i.e., to complete the detection of whether the pressure-sensitive distance is qualified. The structure is simple, the operation is convenient, and the accuracy is high.

[0053] It should be noted that the pressure-sensitive component 301 includes a protrusion connected to the board body 302 and a protruding tip connected to the side of the protrusion away from the board body 302. During the testing process, the actual detection is whether the protruding tip is in contact with the pressing component 220. Specifically, when the workpiece to be tested is a PCB board 310, the standard requirement for the pressure-sensitive distance is 0.5mm-0.8mm, that is, the height of the protruding tip on the pressure-sensitive component 301 ranges from 0.5mm to 0.8mm. The specific inspection process for whether the pressure-sensitive distance is qualified is as follows:

[0054] 1. Place the PCB board 310 in the positioning base 1, and install the pressing unit 2 in the first position, that is, the first stepped surface 221 on the pressing member 220 faces the pressure-sensitive member 301. At this time, the distance between the first stepped surface 221 and the board body 302 of the PCB board is the first preset distance, and the distance H1 between the side of the protrusion and the protrusion on the pressure-sensitive member 301 and the first stepped surface 221 is the maximum limit value of 0.8mm. Press the pressing unit 2 tightly. If the indicator light is on, it means that the pressure-sensitive distance exceeds 0.8mm, and the PCB board test is determined to be unsuccessful; if the indicator light is not on, it means that the pressure-sensitive distance does not exceed 0.8mm, and the pressure-sensitive distance of the pressure-sensitive member 301 on the PCB board is determined to be within the maximum limit value range.

[0055] 2. Push the pressing unit 2 along the extension direction of the accommodating groove 110 to switch the pressing unit 2 to the second position, that is, the second stepped surface 222 on the pressing piece 220 is opposite to the pressure-sensitive piece 301, at this time, the distance between the second stepped surface 222 and the plate body 302 of the PCB is a second preset distance, the distance H2 between the convex tip on the pressure-sensitive piece 301 and the side connected with the convex block and the second stepped surface 222 is a minimum limit value of 0.5 mm, if the indicator light is not on, it indicates that the pressure-sensitive distance is less than 0.5 mm, then it is determined that the PCB test is failed; if the indicator light is on, it indicates that the pressure-sensitive distance is greater than 0.5 mm, then it is determined that the pressure-sensitive distance of the pressure-sensitive piece 301 on the PCB is greater than the minimum limit value;

[0056] In summary, for the case that the workpiece to be detected is the PCB 310, the pressure-sensitive test fixture as shown in Figures 1 to 9 is used for measurement, only when the indicator light is not on when the pressing piece 220 is in the first position and the indicator light is on when the pressing piece 220 is in the second position, it indicates that whether the PCB pressure-sensitive key distance meets the standard requirement in the range of 0.5 mm to 0.8 mm, the pressure-sensitive distance is qualified.

[0057] Preferably, the plate body 211, the leg 212 and the pressing piece 220 are integrally formed.

[0058] In an embodiment, the side wall of the accommodating groove 110 is provided with a let-in part 112, the plate body 211 is movably placed in the let-in part 112, the bottom surface of the let-in part 112 forms a support surface 111, the support surface 111 is lower than the side of the positioning base 1 away from the bottom surface of the accommodating groove 110 and higher than the bottom surface of the accommodating groove 110, the inner walls of the two ends of the let-in part 112 in the extension direction of the accommodating groove 110 form limiting surfaces, and the distance between the two limiting surfaces is greater than the length dimension of the plate body 211 in the extension direction of the accommodating groove 110. By setting the let-in part 112 on the side wall of the accommodating groove 110 to cooperate with the plate body 211, on the one hand, the support surface 111 formed by the bottom surface of the let-in part 112 supports the plate body 211 in the groove depth direction, and on the other hand, the side wall of the let-in part 112 limits the plate body 211 in the vertical direction to the groove depth direction, further, the distance between the two inner walls of the two ends of the let-in part 112 in the extension direction of the accommodating groove 110 is greater than the dimension of the plate body 211 in the extension direction of the accommodating groove 110, which can realize the movement of the plate body 211 in the extension direction of the accommodating groove 110, thereby realizing the movement of the pressing unit 2 between the first position and the second position, the structure is simple, stable and reliable. Wherein, the groove depth direction refers to the recess direction of the accommodating groove 110, that is, the direction of "up and down" indicated by the arrow in Figure 1 , and the length dimension refers to the dimension in the "length direction" indicated by the arrow in Figure 1 .

[0059] In addition, in other embodiments, furtherFigures 10 to 18 As shown, the workpiece to be tested is a movement assembly 320, the movement assembly 320 includes a motor assembly 321, a PCB board 310 and an elastic member 322, the elastic member 322 is supported between the motor assembly 321 and the PCB board 310; the end of the pressing member 220 away from the plate body 211 abuts against the side of the motor assembly 321 away from the PCB board 310, the pressing member 220 is adjustably connected to the plate body 211 to change the distance between the motor assembly 321 and the PCB board 310. It should be noted that in the movement assembly 320, the elastic member 322 is supported between the motor assembly 321 and the PCB board 310, when using the electric toothbrush, the motor assembly 321 is pushed to move towards the PCB board by pressing the key on the body, the motor assembly 321 compresses the elastic member 322 until the motor assembly 321 presses the pressure sensing member 301 on the PCB board 310, the circuit on the PCB board 310 is turned on, the electric toothbrush is started, and the indicator light is on. Correspondingly, for the case that the workpiece to be tested is the movement assembly 320, the pressure sensing distance to be detected is the distance that the motor assembly 321 moves towards the PCB board 310. Wherein, the adjustably connected of the pressing member 220 to the plate body 211 means that the pressing member 220 can move along the groove depth direction relative to the plate body 211. The first position and the second position are arranged along the groove depth direction, by adjusting the position of the pressing member 220 relative to the plate body 211 along the groove depth direction, the switching of the pressing member 220 between the first position and the second position can be realized. The upper surface of the positioning base 1 forms a support surface 111.

[0060] By arranging the pressing member 220 to abut against the motor assembly 321, and the adjustably connected of the pressing member 220 to the plate body 211, by adjusting the distance that the pressing member 220 extends out of the plate body 211 along the groove depth direction, the switching of the pressing member 220 between the first position and the second position is realized, and the pressing member 220 presses the motor assembly 321 along the groove depth direction is realized, so that whether the pressure sensing distance meets the standard preset range is detected, which is convenient to operate, high in accuracy and good in flexibility.

[0061] In one embodiment, the plate body 211 is provided with a first through hole 213, and the pressing unit 2 further comprises a push block 230 and an adjusting piece 240. The push block 230 is arranged on the side of the plate body 211 away from the positioning base 1, and the push block 230 is arranged in a spaced manner with the plate body 211. The push block 230 is provided with a second through hole 231 corresponding to the first through hole 213, and the pressing piece 220 passes through the first through hole 213 and is connected with the push block 230 through the second through hole 231. One end of the adjusting piece 240 is connected with the plate body 211, and the other end is connected with the push block 230. The adjusting piece 240 is adapted to adjust the distance between the push block 230 and the plate body 211. By arranging the push block 230 on the side of the plate body 211 away from the positioning base 1, and arranging the adjusting piece 240 between the push block 230 and the plate body 211, the distance between the push block 230 and the plate body 211 is adjusted by the adjusting piece 240, so that the pressing piece 220 connected with the push block 230 is moved up and down relative to the plate body 211 by the push block 230, that is, the distance of the pressing piece 220 extending out of the plate body 211 along the groove depth direction is adjusted, so that the pressing piece 220 is switched between the first position and the second position.

[0062] In one embodiment, the pressing piece 220 comprises a push rod 223 and a locking part 224. The push rod 223 comprises a rod part 2231 and a head part 2232 connected with each other. The cross-sectional area of the head part 2232 is larger than that of the rod part 2231. The rod part 2231 is movably arranged in the first through hole 213, and the head part 2232 is located on the side of the plate body 211 facing the PCB 310. The locking part 224 is located on the side of the plate body 211 away from the workpiece to be measured. The locking part 224 is detachably connected with the end of the rod part 2231 away from the head part 2232. One of the locking part 224 and the rod part 2231 passes through the second through hole 231 and is connected with the other. By movably arranging the push rod 223 of the pressing piece 220 in the first through hole 213 of the plate body 211, the relative position of the push rod 223 and the plate body 211 is adjusted. At the same time, one of the locking part 224 and the rod part 2231 passes through the second through hole 231 and is connected with the other, so that the push rod 223 is connected with the push block 230 through the locking part 224. The locking part 224 is detachably connected with the rod part 2231, which facilitates disassembly and has high flexibility and is convenient to use.

[0063] In one embodiment, the outer circumferential surface of the push rod 223 is smooth, the push rod 223 is in sliding fit with the plate body 211, the cross-sectional area of the push rod 223 is greater than the area of the second through hole 231, and then the end of the rod portion 2231 away from the head portion 2232 abuts against the side of the push block 230 facing the plate body 211. The end of the rod portion 2231 away from the head portion 2232 is provided with a locking hole 225, the locking hole 225 is provided with an internal thread, the locking portion 224 is a screw, the screw is in threaded fit with the locking hole 225 after passing through the second through hole 231, and thus the push rod 223 is locked on the push block 230 through the locking portion 224, so as to facilitate the up and down movement of the push rod 223 through the push block 230.

[0064] In addition, in other embodiments, the push rod 223 includes a first rod segment and a second rod segment, the first rod segment is connected between the head portion 2232 and the second rod segment, the outer circumferential surface of the first rod segment is smooth, the first rod segment is in sliding fit through the first through hole 213, the cross-sectional area of the first rod segment is greater than the area of the second through hole 231, the cross-sectional area of the second rod segment is smaller than that of the first rod segment, the second rod segment is selectively in fit through the second through hole 231, the second rod segment is provided with an external thread, and the locking portion 224 is a nut, which is in threaded fit with the second rod segment. In this way, the push rod 223 can also be locked on the push block 230.

[0065] In one embodiment, the push block 230 is further provided with a third through hole 232, the plate body 211 is further provided with a fifth through hole 214, the third through hole 232 and the fifth through hole 214 are threaded holes, the adjusting member 240 is a screw, the head portion of the screw is located on the side of the push block 230 away from the plate body 211, the rod portion of the screw passes through the third through hole 232 and then passes into the fifth through hole 214, and the screw is in threaded connection with the threaded holes. By adjusting the tightening degree of the screw and the threaded holes, the distance between the push block 230 and the plate body 211 can be adjusted. The threaded connection structure is simple, reliable, stable, easy to adjust, and convenient to use.

[0066] In one embodiment, the push block 230 is further provided with a fourth through hole 233, the fourth through hole 233 is spaced apart from the first through hole 213 and the second through hole 231, and the pressing unit 2 further includes a positioning column 250, one end of the positioning column 250 is connected with the plate body 211, and the push block 230 is in sliding fit on the positioning column 250 through the fourth through hole 233. By providing the fourth through hole 233 on the push block 230 and sleeving the push block 230 on the positioning column 250 connected with the plate body 211 through the fourth through hole 233, the positioning column 250 provides guidance for the installation of the push block 230 and the relative movement between the push block 230 and the plate body 211. Under the joint limitation of the adjusting member 240 and the positioning column 250, the radial positioning of the push block 230 and the plate body 211 is realized, which is conducive to improving the stability of the structure.

[0067] In one embodiment, the plate body 211 is provided with a positioning hole 217, which is a blind hole, and the positioning column 250 is adapted to be inserted into the positioning hole 217.

[0068] In one embodiment, the number of the adjusting member 240 is at least two, and the number of the positioning column 250 is at least two. The adjusting member 240 and the positioning column 250 are arranged alternately and surround the circumference of the push rod 223. By setting the number of the adjusting member 240 and the positioning column 250 to be at least two, the stability and smoothness of the connection between the push block 230 and the plate body 211 can be further improved. At the same time, by arranging the adjusting member 240 and the positioning column 250 alternately and surrounding the circumference of the push rod 223, the uniformity of the distribution of the adjusting member 240 and the positioning column 250 can be ensured, thereby improving the stability of the movement during the relative movement between the push block 230 and the plate body 211.

[0069] Correspondingly, the number of the third through hole 232 is at least two, and the number of the fourth through hole 233 is at least two. The third through hole 232 and the fourth through hole 233 are arranged alternately and surround the circumference of the second through hole 231. Preferably, the number of the third through hole 232 is two, and the number of the fourth through hole 233 is two. The push block 230 is square, and one through hole is arranged at each of the four corners of the square. The two third through holes 232 are arranged diagonally, and the two fourth through holes 233 are arranged diagonally. The structure is simple and can ensure stability.

[0070] In one embodiment, the pressing unit 2 further comprises a scale 260, which is installed on the plate body 211 and adjacent to the push block 230 to measure the movement distance of the push block 230. By installing the scale 260 adjacent to the push block 230 on the plate body 211, the distance of the push block 230 moving towards the plate body 211 can be read by the scale, thereby facilitating the control of the change value of the distance of the push rod 223 extending out of the plate body 211, and improving the accuracy of measurement.

[0071] In one embodiment, the plate body 211 is provided with a first mounting hole 215, and the scale 260 is installed in the first mounting hole 215 to fix the scale 260 on the plate body 211. Preferably, the first mounting hole 215 is a counterbore, and the scale 260 is embedded in the counterbore.

[0072] In one embodiment, the pressure-sensitive distance test jig further comprises a locking member 270. The plate body 211 is provided with a second mounting hole 216, and the positioning base 1 is provided with a third mounting hole. The locking member 270 passes through the second mounting hole 216 and then passes into the third mounting hole to cooperate with the third mounting hole, thereby fixing the plate body 211 on the positioning base 1 and further improving the stability of the structure.

[0073] Preferably, the locking element 270 is a screw, and the third mounting hole is a threaded hole.

[0074] Specifically, when the workpiece to be tested is the mechanism assembly 320, the assembly process of the pressure-sensitive distance testing fixture and the mechanism assembly 320 is as follows:

[0075] 1. Assemble the pressing unit 2: After the push rod 223 passes through the plate 211, lock the push rod 223 and the push block 230 through the locking part 224, fix the positioning post 250 on the plate 211, and put the push block 230 on the positioning post 250 through the fourth through hole 233. Then install the scale 260, and finally insert the adjusting part 240 from the top of the push block 230 until the adjusting part 240 is inserted into the fifth through hole 214 on the plate 211 to complete the assembly of the pressing unit 2.

[0076] 2. Place the movement component 320 to be tested into the positioning base 1 for fixation, and then place the assembled pressing unit 2 on the upper side of the positioning base 1 and fix it with the locking piece 270 to complete the assembly.

[0077] It should be noted that when the workpiece to be tested is the mechanism assembly 320, the pressure-sensitive distance is the distance that the pressing element 220 presses down on the motor assembly 321. Figures 10 to 18 The pressure-sensitive distance test fixture shown is used for measurement, where downward pressure refers to the direction towards... Figure 16 Press in the direction indicated by the middle arrow ("down"), that is, press towards the PCB board. The process for checking whether the pressure sensitivity distance is qualified is as follows:

[0078] 1. First, after assembling the pressure-sensitive distance test fixture and the core assembly 320 according to the above assembly process, do not lock the adjusting part 240. At this time, the push rod 223 abuts against the upper surface of the motor assembly 321, and the motor assembly 321 is not pressed down. Record the initial value of the push block 230 on the scale 260 at this time, and define it as the initial zero position.

[0079] 2. Next, set the standard required distance for the pressing component 220 to move towards the PCB board 310. Determine whether the pressure-sensitive distance of the mechanism assembly 320 is acceptable based on whether the indicator light illuminates, i.e., whether the pressure sensitivity of the mechanism is faulty. Taking a standard required pressure-sensitive distance of 0.5mm-0.8mm as an example, the specific process is as follows:

[0080] 1) through the adjusting member 240 push block 230 to the direction of the plate body 211 moves the minimum limit value of the standard range value requirements of 0.5mm (when the adjusting member 240 is a screw, specifically, tighten the screw, so that the push block 230 and the plate body 211 between the distance of 0.5mm), at this time, the push rod 223 towards the side of the PCB board end surface and the distance between the PCB board plate body 302 is the first preset distance, the push rod 223 down pressure motor assembly 321 down the distance is the minimum limit value of 0.5mm, if the indicator light is not bright, indicating that the pressure distance is greater than 0.5mm, the judgment of the pressure distance of the movement core assembly 320 is greater than the minimum limit value, and the judgment is passed; if the indicator light is bright, indicating that the actual pressure distance is less than 0.5mm, not in the range of the standard requirements, then the pressure distance is not qualified;

[0081] 2) through the adjusting member 240 push block 230 to the direction of the plate body 211 moves the maximum limit value of the standard range value requirements of 0.8mm, at this time, the push rod 223 towards the side of the PCB board end surface and the distance between the PCB board plate body 302 is the second preset distance, the push rod 223 down pressure motor assembly 321 down the distance is the maximum limit value of 0.8mm, if the indicator light is bright, indicating that the pressure distance is less than 0.8mm, the judgment of the pressure distance of the movement core assembly 320 is less than the standard maximum limit value, and the judgment is passed; if the indicator light is not bright, indicating that the actual pressure distance is greater than 0.8mm, the pressure distance is not qualified;

[0082] In summary, the above two tests on whether greater than the minimum limit value of the standard requirements of 0.5mm and whether less than the maximum limit value of the standard requirements of 0.8mm are both qualified, then the judgment of the movement core assembly is qualified in the measurement standard value of 0.5mm-0.8mm, that is, when the pressing piece 220 is in the first position, the indicator light is not bright, and in the second position, the indicator light is bright, the pressure distance of the movement core assembly 320 is qualified.

[0083] In addition, the pressure distance of the movement core assembly 320 can also be directly measured by the pressure distance test fixture, and the measurement process is as follows:

[0084] First, according to the above-mentioned pressure distance test fixture and the assembly process of the movement core assembly 320, the adjusting member 240 is not locked, at this time, the push rod 223 and the upper surface of the motor assembly 321 are in abutment, the motor assembly 321 is not pressed down, and the initial value of the push block 230 on the scale 260 is recorded, which is defined as the initial zero position; then tighten the adjusting member 240, keep pressing down the push block 230 until the indicator light is bright, read the current scale value on the scale 260, then the difference between the current scale value and the initial value is the actual value of the pressure distance.

[0085] Compared with the traditional measuring process, the height gauge is directly used for measuring in the past, the pressure sensing part is too small, it is not easy to operate, the measurement is not accurate, it takes a long time, the pressure sensing distance test fixture of the embodiment can be simply measured and time is saved.

[0086] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A pressure sensitive distance test fixture, characterized in that, The application relates to a positioning base (1) provided with a containing groove (110) suitable for matching the shape of a workpiece to be measured to fix the workpiece to be measured; a pressing unit (2) detachably matched with the positioning base (1), the pressing unit (2) comprising a supporting part (210) abutting at the opening end of the containing groove (110) and a pressing part (220) connected to the supporting part (210) and suitable for corresponding to a pressure sensing part (301) on the workpiece to be measured, the pressing part (220) having a first position and a second position relative to the positioning base (1); when the pressing part (220) is located at the first position, the distance between the part of the pressing part (220) directly facing the pressure sensing part (301) and the plate body (302) of the workpiece to be measured is a first preset distance; when the pressing part (220) is located at the second position, the distance between the part of the pressing part (220) directly facing the pressure sensing part (301) and the plate body (302) of the workpiece to be measured is a second preset distance, wherein the second preset distance is smaller than the first preset distance; the pressing part (220) moves close to or away from the pressure sensing part (301) to switch between the second position and the first position. The side wall of the containing groove (110) is provided with a supporting surface (111) facing away from the bottom surface of the containing groove (110); the supporting part (210) comprises a plate body (211) and a supporting leg (212) connected to each other, the plate body (211) abuts against the supporting surface (111), the supporting leg (212) extends into the containing groove (110), and the pressing part (220) is connected to the plate body (211). The workpiece to be measured is a PCB (310), the supporting part (210) can move relative to the positioning base (1) along the extension direction of the containing groove (110), the pressing part (220) is fixedly connected to the plate body (211), the end surface of the pressing part (220) facing the workpiece to be measured is in a stepped shape, the stepped end surface comprises a first stepped surface (221) and a second stepped surface (222) arranged along the extension direction of the containing groove (110), and the distance between the first stepped surface (221) and the body of the PCB (310) is greater than the distance between the second stepped surface (222) and the body of the PCB (310). ​ ​ 2. The pressure sensitive distance test fixture of claim 1, wherein, ​ 3. The pressure sensitive distance test fixture of claim 2, wherein, ​ 4. The pressure sensitive distance test fixture of claim 3, wherein, The side wall of the accommodating groove (110) is provided with a locating part (112), the plate body (211) is movably placed in the locating part (112), the bottom surface of the locating part (112) forms the supporting surface (111), the supporting surface (111) is lower than the side of the positioning base (1) away from the bottom surface of the accommodating groove (110) and higher than the bottom surface of the accommodating groove (110), the inner walls of the two ends of the locating part (112) form limiting surfaces in the extension direction of the accommodating groove (110), and the distance between the two limiting surfaces is greater than the length dimension of the plate body (211) in the extension direction of the accommodating groove (110).

5. The pressure sensitive distance testing fixture of claim 2, wherein, The workpiece to be measured is a movement assembly (320), the movement assembly (320) comprises a motor assembly (321), a PCB (310) and an elastic element (322), and the elastic element (322) is supported between the motor assembly (321) and the PCB (310). One end of the pressing piece (220) away from the plate body (211) abuts against one side of the motor assembly (321) away from the PCB (310), and the pressing piece (220) is adjustably connected to the plate body (211) so as to change the distance between the motor assembly (321) and the PCB (310).

6. The pressure sensitive distance testing fixture of claim 5, wherein, The plate body (211) is provided with a first through hole (213), and the pressing unit (2) further comprises: A push block (230) is arranged on the side of the plate body (211) away from the positioning base (1), the push block (230) is arranged in a spaced manner with the plate body (211), the push block (230) is provided with a second through hole (231), the second through hole (231) corresponds to the first through hole (213), the pressing piece (220) is connected to the push block (230) through the second through hole (231) after passing through the first through hole (213); An adjusting piece (240) is connected to the plate body (211) at one end and connected to the push block (230) at the other end, and the adjusting piece (240) is adapted to adjust the distance between the push block (230) and the plate body (211).

7. The pressure sensitive distance testing fixture of claim 6, wherein, The pressing piece (220) comprises: A push rod (223) comprises a rod portion (2231) and a head portion (2232) connected to each other, the cross-sectional area of the head portion (2232) is greater than that of the rod portion (2231), the rod portion (2231) is movably arranged in the first through hole (213), and the head portion (2232) is located on the side of the plate body (211) facing the PCB (310). A locking portion (224) is located on the side of the plate body (211) away from the workpiece to be measured, and is detachably connected to the end of the rod portion (2231) away from the head portion (2232). One of the locking portion (224) and the rod portion (2231) is connected to the other after passing through the second through hole (231).

8. The pressure sensitive distance testing fixture of claim 7, wherein, A fourth through hole (233) is further formed in the push block (230), and the fourth through hole (233) is spaced apart from the first through hole (213) and the second through hole (231). The pressing unit (2) further comprises a positioning column (250), one end of which is connected to the plate body (211), and the push block (230) is slidably sleeved on the positioning column (250) through the fourth through hole (233).

9. The pressure sensitive distance testing fixture of claim 8, wherein, The number of the adjusting members (240) is at least two, and the number of the positioning columns (250) is at least two. The adjusting members (240) and the positioning columns (250) are arranged alternately around the circumference of the push rod (223).

10. The pressure sensitive distance testing fixture of claim 8, wherein, The pressing unit (2) further comprises a scale (260) installed on the plate body (211) and adjacent to the push block (230) to measure the moving distance of the push block (230).

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