A back-drilling depth testing device

Abstract

The utility model belongs to the related technical field of testing arrangement especially, it is a kind of back drilling depth testing device. By setting shell, including first casing and second casing, first casing one end and second casing are connected, and the one end of first casing is away from second casing is provided with test platform, and the centre of test platform is provided with first port, and mobile passageway is provided between first casing and second casing;Measurement component, including measurement and test piece, measurement moves in mobile passageway, and test piece is connected in the one end of measurement close to first port, and test piece extends to first casing outside by first port;Wherein, second casing is provided with detection end, and when test piece moves to back drilling hole bottom and test platform abuts on the surface of circuit board, detection end detects the movement stroke of measurement to calculate back drilling hole depth. The depth of back drilling hole is tested by the device, to avoid the problem of high production cost and too complex equipment caused by visual equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of testing devices, and in particular relates to a back-drilling depth testing device. Background Technology

[0002] Back drilling is a crucial step in PCB manufacturing. During back drilling, residual spikes are typically created within the drilled holes. The length of these spikes needs to be controlled; otherwise, excessively long spikes can lead to waveform distortion, signal transmission delays, electromagnetic coupling interference with adjacent signals, and poor heat dissipation. Since residual spikes are usually unavoidable, the only way to avoid these problems is to prevent them from becoming too long. The length of these spikes cannot be measured precisely and must typically be calculated based on the depth of the drilled hole.

[0003] In existing technologies, the depth of back-drilled holes is usually measured using vision equipment. Although this method can measure the depth of back-drilled holes, vision equipment is expensive and very costly. Therefore, in some low-cost circuit board production testing scenarios, the method of detecting the depth of back-drilled holes using vision equipment is not applicable. Utility Model Content

[0004] To address the problem that "current equipment for testing the back-drilling depth of circuit boards is too complex and has excessively high production costs," this utility model proposes a back-drilling depth testing device.

[0005] This utility model solves the above problems through the following technical solution: In a first aspect, this utility model proposes a back-drilling depth testing device, comprising: The outer shell includes a first shell and a second shell, one end of the first shell is connected to the second shell, a test platform is provided at the end of the first shell away from the second shell, a first port is provided at the center of the test platform, and a moving channel is provided between the first shell and the second shell; The measuring assembly includes a measuring part and a test piece. The measuring part moves within a moving channel, and the test piece is connected to the end of the measuring part near the first port. The test piece extends from the first port to the outside of the first housing. The second housing is equipped with a detection end. When the test piece moves to the bottom of the back drill hole and the test platform abuts against the surface of the circuit board, the detection end detects the movement of the measuring part to calculate the depth of the back drill hole.

[0006] The device comprises a first housing and a second housing, with one end of the first housing connected to the second housing. A test platform is located at the end of the first housing furthest from the second housing, and a first port is located at the center of the test platform. A moving channel is provided between the first and second housings. A measuring assembly includes a measuring part and a test piece. The measuring part moves within the moving channel, and the test piece is connected to the end of the measuring part near the first port, extending from the first port to the outside of the first housing. The second housing is provided with a detection end. When the test piece moves to the bottom of the back-drilled hole and the test platform abuts against the circuit board surface, the detection end detects the movement stroke of the measuring part to calculate the back-drilled hole depth. This device tests the depth of back-drilled holes, avoiding the problems of excessively high production costs and overly complex equipment caused by using vision equipment.

[0007] In some implementations, the test piece is set up as a test probe.

[0008] In some embodiments, an elastic component is provided inside the first housing, which is connected to the measuring part to cause the test piece to spring back to its original position.

[0009] In some embodiments, the elastic component includes an elastic element, a first movable stage and a second movable stage. The first movable stage is fixed on the first housing and is located near the connection end between the first housing and the second housing. The second movable stage is slidably disposed near the first port. The test piece is fixed on the second movable stage, and the elastic element is disposed between the first movable stage and the second movable stage.

[0010] In some embodiments, a fixing groove is provided on one side of the first housing, and a fixing hole is provided on the side of the first movable stage. The first movable stage moves relative to the fixing groove, and the first movable stage is fixed by a fixing member passing through the fixing groove and the fixing hole.

[0011] In some embodiments, an adjustment component is also included, wherein a second port is provided at the end of the second housing away from the first housing, and the adjustment component is connected to the measuring unit to adjust the position of the measuring unit.

[0012] In some embodiments, the adjustment assembly includes a lever and a first base, the first base being disposed outside the second housing. One end of the lever is connected to the measuring part, and the middle part of the lever is rotatably connected to the first base, so that the end of the lever away from the measuring part is pressed to adjust the measuring part.

[0013] In some embodiments, the lever is provided with a first arc and a second arc, the first arc and the second arc are mirror images of each other with respect to the middle of the lever, the first arc is connected to the measuring part, and the first arc is bent away from the direction of the second housing.

[0014] In some implementations, the measuring unit is configured as a depth scale.

[0015] In some embodiments, a display screen is provided on the outside of the second housing to display the detection data of the detection end.

[0016] The beneficial effects of this utility model's back-drilling depth testing device are: The device comprises a first housing and a second housing, with one end of the first housing connected to the second housing. A test platform is located at the end of the first housing furthest from the second housing, and a first port is located at the center of the test platform. A moving channel is provided between the first and second housings. A measuring assembly includes a measuring part and a test piece. The measuring part moves within the moving channel, and the test piece is connected to the end of the measuring part near the first port, extending from the first port to the outside of the first housing. The second housing is provided with a detection end. When the test piece moves to the bottom of the back-drilled hole and the test platform abuts against the circuit board surface, the detection end detects the movement stroke of the measuring part to calculate the back-drilled hole depth. This device tests the depth of back-drilled holes, avoiding the problems of excessively high production costs and overly complex equipment caused by using vision equipment. Attached Figure Description

[0017] Figure 1 A front view of the back drilling depth testing device of this utility model. Figure 1 ; Figure 2 A front view of the back drilling depth testing device of this utility model. Figure 2 ; Figure 3 This is a perspective view of the fixing component and fixing groove of the back drill depth testing device of this utility model; Figure 4 This is a perspective view of the lever of a back-drilling depth testing device according to this utility model.

[0018] Figure label: 1. Outer shell; 11. First shell; 12. Second shell; 13. Test platform; 14. Moving channel; 2. Measurement components; 21. Measurement section; 22. Test probe; 23. Detection end; 24. Display screen; 3. Elastic component; 31. Elastic element; 32. First moving stage; 321. Fixing element; 322. Fixing groove; 33. Second moving stage; 4. Adjustment components; 41. Lever; 411. First arc; 412. Second arc; 42. First base. Detailed Implementation It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this utility model can be combined with each other. The detailed description in the specific embodiments should be understood as an explanation of the spirit of this utility model and should not be regarded as an improper limitation of this utility model.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the specific technical solutions of this utility model will be further described in detail below with reference to the accompanying drawings of the embodiments of this utility model. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] In the embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] Furthermore, in this embodiment of the invention, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0022] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0023] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0024] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant information in a specific manner.

[0025] Example 1: like Figure 1 As shown, this embodiment proposes a back-drilling depth testing device, comprising: The outer shell 1 includes a first shell 11 and a second shell 12. One end of the first shell 11 is connected to the second shell 12. A test platform 13 is provided at the end of the first shell 11 away from the second shell 12. A first port is provided at the center of the test platform 13. A moving channel 14 is provided between the first shell 11 and the second shell 12. The measuring component 2 includes a measuring part 21 and a test piece. The measuring part 21 moves within the moving channel 14. The test piece is connected to the end of the measuring part 21 near the first port and extends from the first port to the outside of the first housing 11. The second housing 12 is provided with a detection end 23. When the test piece moves to the bottom of the back drill hole and the test platform 13 abuts against the surface of the circuit board, the detection end 23 detects the movement stroke of the measuring part 21 to calculate the depth of the back drill hole.

[0026] Specifically, the outer casing 1 includes a first casing 11 and a second casing 12, which are connected. A test platform 13 is fixed to the end of the first casing 11 away from the second casing 12. The test platform 13 is used to conform to the surface of the circuit board and is made of steel to ensure its rigidity. In some preferred embodiments, the first casing 11 is cylindrical, and the test platform 13 is also cylindrical. A first port is provided at the center of the test platform 13 to allow the test piece to move. The test platform 13 can be integrally formed with the first casing 11, or it can be screwed onto the first casing 11 using threads to reduce the complexity of the device. The first casing 11 and the second casing 12 are provided with a moving channel 14. The moving channel 14 can be a solid channel or a slot provided at both ends of the first casing 11 and the second casing 12 to confine the measuring unit 21 within the first casing 11 and the second casing 12 for movement. In the testing assembly, the testing unit moves within the moving channel 14. A test piece is positioned at one end of the measuring unit 21 near the first port. The test piece extends beyond the first housing 11 from the first port, allowing the measuring unit 21 to move relative to the test channel when the test piece contacts the bottom of the back drill. Simultaneously, when the testing platform 13 is attached to the circuit board, the depth of the back drill hole is calculated based on the movement stroke. The main function of the testing platform 13 is to press the steel seat against the board surface after the probe is inserted into the back drill hole, causing the probe to retract inward. The steel seat is 6mm thick and is rotatably fixed to the sleeve.

[0027] The first housing 11 is mainly used to fix the probe and the spring sleeve. The total length of the sleeve is 45mm, the sleeve diameter is 18mm, the sleeve thickness is 4mm, and the inner diameter is 10mm.

[0028] The device comprises a housing 1, including a first housing 11 and a second housing 12, with one end of the first housing 11 connected to the second housing 12. A test platform 13 is located at the end of the first housing 11 furthest from the second housing 12, with a first port at the center of the test platform 13. A moving channel 14 is provided between the first housing 11 and the second housing 12. A measuring component 2 includes a measuring part 21 and a test piece. The measuring part 21 moves within the moving channel 14, and the test piece is connected to the end of the measuring part 21 near the first port, extending from the first port to the outside of the first housing 11. The second housing 12 is provided with a detection end 23. When the test piece moves to the bottom of the back-drilled hole and the test platform 13 abuts against the circuit board surface, the detection end 23 detects the movement stroke of the measuring part 21 to calculate the back-drilled hole depth. This device tests the depth of back-drilled holes, avoiding the problems of excessively high production costs and overly complex equipment associated with using vision devices.

[0029] Example 2: like Figures 2-4 As shown, this embodiment further explains and optimizes the structure proposed in Embodiment 1: In some embodiments, the test piece is configured as test probe 22.

[0030] Specifically, the slender probe can be inserted into the back drill hole (total length 13mm, of which the slender probe is 8mm long and the diameter is 0.025-0.075mm smaller than the back drill hole). The diameter and length can be customized according to the back drill requirements, and the upper tapered end is integrated with the probe design.

[0031] In some embodiments, an elastic component 3 is provided inside the first housing 11, and the elastic component 3 is connected to the measuring part 21 so that the test piece springs back to its original position.

[0032] Specifically, in the structure proposed in Embodiment 1, the test piece needs to be reset to a preset position after each measurement, thus requiring repeated measurements. This method results in low testing efficiency. Therefore, to solve this problem, an elastic component 3 is provided inside the first housing 11. The elastic component 3 is connected to the measuring part 21, so that when the test piece touches the bottom of the back drill hole, the measuring part 21 is displaced while the elastic component 3 is also pressed. This allows the elastic component 3 to rebound and reset the test piece when the test is completed, thereby improving testing efficiency.

[0033] In some embodiments, the elastic component 3 includes an elastic element 31, a first movable stage 32 and a second movable stage 33. The first movable stage 32 is fixed on the first housing 11 and is located near the connection end of the first housing 11 and the second housing 12. The second movable stage 33 is slidably disposed near the first port. The test piece is fixed on the second movable stage 33. The elastic element 31 is disposed between the first movable stage 32 and the second movable stage 33.

[0034] Specifically, the elastic component 3 includes an elastic element 31, a first movable stage 32, and a second movable stage 33. The first movable stage 32 is fixed on the first housing 11 and is located near the connection end between the first housing 11 and the second housing 12. The second movable stage 33 is slidably disposed near the first port to achieve movement relative to the first housing 11. Preferably, the first housing 11 is a cylinder, and the second movable stage 33 and the first movable stage 32 are also cylindrical. The dimensions of the second movable stage 33 and the first movable stage 32 can be just limited inside the first housing 11 to avoid relative misalignment of the second movable stage 33 and the first movable stage 32 during movement. The test piece is fixed on the second movable stage 33. It can be integrally mounted on the second movable stage 33, preferably with threads on both the test piece and the second movable stage 33, allowing the test piece to be fixed via a threaded connection and thus making it replaceable. An elastic element 31 is positioned between the first movable stage 32 and the second movable stage 33. The elastic element 31 can be a spring, elastic cotton, rubber, an elastic coupling, a gasket, etc., so that when the second movable stage 33 moves towards the first movable stage 32, the elastic element 31 accumulates elastic potential energy. After the test, the elastic potential energy is released through the elastic element 31, causing the second movable stage 33 to reset. The elastic element 31 is preferably a spring, with both ends fixed to the middle of the first movable stage 32 and the middle of the second movable stage 33, respectively. The measuring part 21 passes through the spring and moves between the first and second movable stages 32 and 33. The test piece is connected to the second movable stage 33 via the measuring part 21, so that when the measuring part 21 moves, it simultaneously moves the second movable stage 33 and the elastic element 31, accumulating potential energy.

[0035] In some embodiments, a fixing groove 322 is provided on one side of the first housing 11, and a fixing hole is provided on the side of the first moving platform 32. The first moving platform 32 moves relative to the fixing groove 322, and the first moving platform 32 is fixed by a fixing member 321 passing through the fixing groove 322 and the fixing hole.

[0036] Specifically, a fixing groove 322 is provided on one side of the first housing 11. A fixing member 321 passes through the fixing groove 322 through a fixing hole on the side of the first housing 11, and the fixing hole is tightened to lock the first housing 11. The advantage of this method is that the position of the first moving stage 32 within the first housing 11 can be adjusted, thereby adjusting the tightness of the elastic member 31. It should be noted that the fixing member 321 is usually a screw, and the size of the fixing groove 322 is usually smaller than the size of the nut, so that the screw can be fixed by pressing the nut against both sides of the fixing groove 322. The fixing groove 322 can be formed by multiple openings, and the position of the first moving stage 32 within the first housing 11 can be adjusted by tightening different fixing holes.

[0037] In some embodiments, an adjustment component 4 is also included, wherein a second port is provided at one end of the second housing 12 away from the first housing 11, and the adjustment component 4 is connected to the measuring part 21 to adjust the position of the measuring part 21.

[0038] Specifically, the second housing 12 can be cylindrical, preferably spherical, with a portion of the sphere connected to the first housing 11. A second port can be provided at a position away from the connection point. The measuring part 21 moves between the second port and the connection point between the second housing 12 and the first housing 11. An adjustment component 4 is provided at the second port for manually or automatically adjusting the position of the measuring part 21. The adjustment component 4 can be a push rod, a handle, or other structures to facilitate the adjustment of the position of the measuring part 21.

[0039] In some preferred embodiments, the adjustment assembly 4 includes a lever 41 and a first base 42. The first base 42 is disposed outside the second housing 12. One end of the lever 41 is connected to the measuring part 21, and the middle part of the lever 41 is rotatably connected to the first base 42, so that the end of the lever 41 away from the measuring part 21 is pressed and adjusted to adjust the measuring part 21.

[0040] Specifically, the lever 41 and the first base 42 form a lever structure. The first base 42 is located outside the second housing 12, and the lever 41 is rotatably mounted on the first base 42. It can be a conventional rotating structure with a rotating shaft connection, which will not be described in detail here. One end of the lever 41 is connected to the measuring unit 21, and the other end is free. The position of the measuring unit 21 within the moving channel 14 can be changed by pressing or lifting the free end of the lever 41.

[0041] In some preferred embodiments, the lever 41 is provided with a first arc 411 and a second arc 412, the first arc 411 and the second arc 412 are mirror images of the middle part of the lever 41, the first arc 411 is connected to the measuring part 21, and the first arc 411 is bent away from the second housing 12.

[0042] Specifically, the second housing 12 is typically designed as a spherical structure, and the lever 41 is also provided with a first arc 411 and a second arc 412. The first arc 411 is used to prevent collision with the spherical structure when the lever 41 rotates. The second arc 412 is mirrored in design to facilitate pressing by hand.

[0043] In some embodiments, the measuring unit 21 is configured as a depth scale.

[0044] Specifically, the measuring unit 21 is equipped with a depth scale, which automatically measures the depth and displays the data. It is designed with mode, setting, and data saving buttons. The diameter is 45mm and the total length above the sleeve is 63mm.

[0045] In some embodiments, a display screen 24 is provided outside the second housing 12 to display the detection data of the detection end 23.

[0046] Specifically, the display screen 24 is an automatic counting screen, which is used to automatically measure and display the depth scale under the action of a spring when the probe is inserted into the bottom of the back drill hole.

[0047] The serial numbers of the utility model embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent device or equivalent process transformation made based on the content of this utility model specification and drawings, or direct or indirect application in other related technical fields, are similarly included in the patent protection scope of this utility model.

Claims

1. A back-drilling depth testing device, characterized in that, include: The outer casing (1) includes a first casing (11) and a second casing (12). One end of the first casing (11) is connected to the second casing (12). A test platform (13) is provided at the end of the first casing (11) away from the second casing (12). A first port is provided at the center of the test platform (13). A moving channel (14) is provided between the first casing (11) and the second casing (12). The measuring component (2) includes a measuring part (21) and a test piece, the measuring part (21) moving within the moving channel (14), the test piece being connected to one end of the measuring part (21) near the first port, and the test piece extending from the first port to the outside of the first housing (11); The second housing (12) is provided with a detection end (23). When the test piece moves to the bottom of the back drill hole and the test platform (13) abuts against the surface of the circuit board, the detection end (23) detects the movement stroke of the measuring part (21) to calculate the depth of the back drill hole.

2. The back-drilling depth testing device according to claim 1, characterized in that, The test piece is set as a test probe (22).

3. The back-drilling depth testing device according to claim 1, characterized in that, An elastic component (3) is provided inside the first housing (11), and the elastic component (3) is connected to the measuring part (21) so that the test piece springs back to its original position.

4. The back-drilling depth testing device according to claim 3, characterized in that, The elastic component (3) includes an elastic element (31), a first moving stage (32) and a second moving stage (33). The first moving stage (32) is fixed on the first housing (11) and the first moving stage (32) is close to the connection end of the first housing (11) and the second housing (12). The second moving stage (33) is slidably disposed near the first port. The test piece is fixed on the second moving stage (33). The elastic element (31) is disposed between the first moving stage (32) and the second moving stage (33).

5. The back-drilling depth testing device according to claim 4, characterized in that, A fixing groove (322) is provided on one side of the first housing (11), and a fixing hole is provided on the side of the first moving platform (32). The first moving platform (32) moves relative to the fixing groove (322), and the first moving platform (32) is fixed by a fixing member (321) passing through the fixing groove (322) and the fixing hole.

6. The back-drilling depth testing device according to claim 1, characterized in that, It also includes an adjustment component (4), wherein a second port is provided at one end of the second housing (12) away from the first housing (11), and the adjustment component (4) is connected to the measuring part (21) so as to adjust the position of the measuring part (21) by means of the adjustment component (4).

7. The back-drilling depth testing device according to claim 6, characterized in that, The adjustment assembly (4) includes a lever (41) and a first base (42). The first base (42) is disposed outside the second housing (12). One end of the lever (41) is connected to the measuring part (21), and the middle part of the lever (41) is rotatably connected to the first base (42) so that the end of the lever (41) away from the measuring part (21) is pressed and adjusted to adjust the measuring part (21).

8. The back-drilling depth testing device according to claim 7, characterized in that, The lever (41) is provided with a first arc (411) and a second arc (412). The first arc (411) and the second arc (412) are mirror images of the middle part of the lever (41). The first arc (411) is connected to the measuring part (21). The first arc (411) is bent away from the second housing (12).

9. The back-drilling depth testing device according to claim 1, characterized in that, The measuring unit (21) is configured as a depth scale.

10. The back-drilling depth testing device according to claim 1, characterized in that, The second housing (12) is provided with a display screen (24) to display the detection data of the detection end (23).

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