Multi-cycle square wave test fixture

Abstract

The utility model relates to the technical field of test fixtures, in particular to a multi-cycle square wave test fixture. According to the technical scheme, the circuit board detection device comprises a base, a supporting column fixedly installed on the base and an installation plate fixedly installed on the supporting column, and further comprises a lifting driving mechanism arranged on the installation plate, a pressing plate is installed on the lifting driving mechanism, a plurality of spring probes are installed on the pressing plate, a mold used for containing a circuit board is installed on the base, and the spring probes are installed on the mold. The mold is provided with a placing groove for placing a circuit board jack and a plug-in mechanism, and the plug-in mechanism is installed on the base and connected with the lifting driving mechanism. According to the utility model, through the plugging mechanism, when the lifting plate descends, the plug can be driven to move towards the direction close to the socket of the circuit board, and then the plug is combined with the socket of the circuit board, so that the circuit connection can be quickly completed, the working efficiency is improved, and the manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a multi-cycle square wave test fixture. Background Art

[0002] The multi-cycle square wave test fixture is a device specially used to test the multiple cycle characteristics of square wave signals in electronic equipment. This test fixture is mainly used for digital circuits or digital integrated circuits, because square wave signals are a common signal type in digital circuits. Square wave signals have clear amplitude and time characteristics. The multi-cycle square wave test fixture can capture and analyze a complete square wave signal cycle, as well as signal waveforms of multiple cycles, to evaluate the performance and stability of electronic products.

[0003] During testing, it is necessary to ensure that the device under test is correctly connected to the test fixture. According to the requirements of the fixture and the device under test, the probes or connecting cables should be correctly inserted. The existing test fixture requires manual cable connection, which is slow in testing batches. Summary of the invention

[0004] The utility model aims to solve the problems existing in the background technology and proposes a multi-cycle square wave test fixture which can quickly connect the cable of the tested device.

[0005] The technical solution of the utility model is a multi-cycle square wave test fixture, comprising a base, a support column fixedly mounted on the base, a mounting plate fixedly mounted on the support column, and further comprising:

[0006] A lifting drive mechanism is arranged on the mounting plate, a pressing plate is installed on the lifting drive mechanism, a plurality of spring probes are installed on the pressing plate, a mold for placing a circuit board is installed on the base, a placement groove for placing a circuit board socket is provided on the mold, and the lifting drive mechanism drives the spring probes to flexibly fix the circuit board;

[0007] The plug-in mechanism is installed on the base and connected to the lifting drive mechanism. A plug connected to the socket of the circuit board is installed on the plug-in mechanism. When the lifting mechanism drives the spring probe to descend, the plug-in mechanism drives the plug to connect with the socket of the circuit board, and when the spring probe rises, the plug is separated from the socket of the circuit board.

[0008] Optionally, the lifting mechanism includes a connecting seat fixedly mounted on the mounting plate, a handle rotatably mounted on the connecting seat, an eccentric rod fixedly mounted on the handle, a connecting rod rotatably mounted on the eccentric rod, a lifting rod rotatably mounted on the connecting rod, and a sliding sleeve fixedly mounted on the connecting seat, the lifting rod is slidably connected to the sliding sleeve, a lifting plate is fixedly mounted on the lifting rod, a plurality of first springs are fixedly mounted on the lifting plate, and the pressure plate is fixedly mounted on one end of the first spring.

[0009] Optionally, a plurality of sliding rods are fixedly mounted on the lifting plate, a limiting block is fixedly mounted on the sliding rods, the pressing plate is slidably connected to the sliding rods, and the pressing plate rests against the limiting block under the action of the first spring.

[0010] Optionally, a plurality of columns are fixedly mounted on the base, and the lifting plate is slidably connected to the columns.

[0011] Optionally, the plug-in mechanism includes a support rod fixedly mounted on the lifting plate, a connecting rod fixedly mounted on the support rod, a driving block rotatably mounted on the connecting rod and slidably mounted on the base, and the plug is fixedly mounted on the driving block.

[0012] Optionally, a slide groove is provided on the base, a slider is fixedly mounted on the driving block, the slider is slidably connected to the slide groove, a second spring is fixedly mounted in the slide groove, and the other end of the second spring is fixedly connected to the slider.

[0013] Optionally, the driving block is triangular, and the roller abuts against an inclined surface of the driving block.

[0014] Optionally, a power connector and a power button are installed on the base.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model drives the spring probe to descend through the lifting drive mechanism, so that the spring probe contacts the test point on the circuit board to transmit signals and make electrical connections. When the spring probe contacts the circuit board, the pressing plate is further moved downward to compress the first spring, and the first spring applies pressure to the pressing plate, so that the spring probe can contact the circuit board firmly to prevent loosening.

[0017] Furthermore, through the plug-in mechanism, when the lifting plate descends, the driving block is driven to move horizontally toward the electric plate, which can drive the plug to move toward the circuit board socket, thereby combining the plug with the circuit board socket, thereby quickly completing the circuit connection, improving work efficiency and saving manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the structure of an embodiment of the utility model is given Figure 1 ;

[0019] Figure 2 A schematic diagram of the structure of an embodiment of the utility model is given Figure 2 ;

[0020] Figure 3 Provide the utility model Figure 1 A partial enlarged view of the middle A;

[0021] Figure 4 Provide the utility model Figure 1 A partial enlarged view of point B in the middle;

[0022] Figure 5 Provide the utility model Figure 2 A partial enlarged view of point C in the middle.

[0023] 1. Base; 2. Support column; 201. Mounting plate; 3. Connecting seat; 301. Handle; 302. Eccentric rod; 303. Connecting rod; 304. Lifting rod; 305. Sliding sleeve; 306. Sliding rod; 307. Limiting block; 308. Pressing plate; 309. First spring; 310. Spring probe; 311. Lifting plate; 4. Support rod; 401. Connecting rod; 402. Roller; 403. Driving block; 404. Plug; 405. Slide groove; 406. Sliding block; 407. Second spring; 5. Column; 6. Power button; 601. Power connector; 7. Mold; 701. Placement slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-3 and Figure 5 As shown, a multi-cycle square wave test fixture proposed by the utility model includes a base 1, a support column 2 fixedly mounted on the base 1, and a mounting plate 201 fixedly mounted on the support column 2. A power connector 601 and a power button 6 are mounted on the base 1. The test fixture can be powered by connecting an external power supply to the power connector 601, and the power supply state can be controlled by the power button 6;

[0028] In this embodiment, the test fixture further includes a lifting drive mechanism installed on the mounting plate 201, a pressing plate 308 installed on the lifting drive mechanism, a plurality of spring probes 310 installed on the pressing plate 308, a mold 7 for placing a circuit board installed on the base 1, a placement slot 701 for placing a circuit board socket is provided on the mold 7, and the lifting drive mechanism drives the spring probes 310 to flexibly fix the circuit board. When testing, the circuit board is placed on the mold 7, which is provided with a limit slot corresponding to the circuit board, and the wiring socket of the circuit board is placed in the placement slot 701.

[0029] Further, the lifting mechanism includes a connection seat 3 fixedly mounted on the mounting plate 201, a handle 301 rotatably mounted on the connection seat 3, an eccentric rod 302 fixedly mounted on the handle 301, a connecting rod 303 rotatably mounted on the eccentric rod 302, a lifting rod 304 rotatably mounted on the connecting rod 303, and a sliding sleeve 305 fixedly mounted on the connection seat 3, the lifting rod 304 is slidably connected with the sliding sleeve 305, a lifting plate 311 is fixedly mounted on the lifting rod 304, a plurality of first springs 309 are fixedly mounted on the lifting plate 311, and a pressing plate 308 is fixedly mounted on one end of the first spring 309. In a test, the handle 301 is rotated to drive the eccentric rod 302 to flip, thereby driving the connecting rod 303 to move, and the connecting rod 303 will drive the lifting rod 304 to move along the axial direction of the sliding sleeve 305, thereby driving the lifting plate 311 to move up and down.

[0030] Among them, a plurality of slide bars 306 are fixedly mounted on the lifting plate 311, and a limit block 307 is fixedly mounted on the slide bar 306. The pressing plate 308 is slidably connected to the slide bar 306, and the pressing plate 308 is pressed against the limit block 307 under the action of the first spring 309. When the lifting plate 311 descends, it will drive the first spring 309 to move downward, thereby driving the pressing plate 308 to move downward, and then the spring probe 310 will descend, so that the spring probe 310 will contact the test point on the circuit board to transmit signals and make electrical connections. When the spring probe 310 contacts the circuit board, the pressing plate 308 will continue to move downward to compress the first spring 309, and the first spring 309 will apply pressure to the pressing plate 308, so that the spring probe 310 can be in stable contact with the circuit board to prevent loosening;

[0031] Among them, a plurality of columns 5 are fixedly mounted on the base 1, and the lifting plate 311 is slidably connected with the columns 5. The columns 5 limit the lifting plate 311 when it is raised and lowered to prevent the lifting plate 311 from deflecting and tilting.

[0032] like Figure 1-2 and Figure 4As shown, the test fixture also includes a plug-in mechanism, which is installed on the base 1 and connected to the lifting drive mechanism. A plug 404 connected to the socket of the circuit board is installed on the plug-in mechanism. When the lifting mechanism drives the spring probe 310 to descend, the plug-in mechanism drives the plug 404 to connect with the socket of the circuit board, and when the spring probe 310 rises, the plug 404 is separated from the socket of the circuit board. The plug-in mechanism includes a support rod 4 fixedly installed on the lifting plate 311, a connecting rod 401 fixedly installed on the support rod 4, a roller 402 rotatably installed on the connecting rod 401, and a driving block 403 slidably installed on the base 1, and the plug 404 is fixedly installed on the driving block 403. A slide groove 405 is provided on the base 1, and a slider 406 is fixedly installed on the driving block 403. The slider 406 is slidably connected to the slide groove 405. A second spring 407 is fixedly installed in the slide groove 405, and the other end of the second spring 407 is fixedly connected to the slider 406. The driving block 403 is triangular, and the roller 402 abuts against the inclined surface of the driving block 403. When the lifting plate 311 descends, it will drive the support rod 4 to move downward, thereby driving the connecting rod 401 to move downward, and then driving the roller 402 to move downward, so that the roller 402 squeezes the driving block 403, so that the driving block 403 moves horizontally in the direction close to the electric board, and then drives the plug 404 to move in the direction close to the circuit board socket, so that the plug 404 is combined with the circuit board socket, so as to complete the connection, when the driving block 403 moves horizontally in the direction close to the electric board, the second spring 407 is stretched, and when the lifting plate 311 rises, the roller 402 rises and will no longer squeeze the driving block 403, and at this time, the driving block 403 is reset under the action of the second spring 407, so that the plug 404 is separated from the circuit board socket.

[0033] The working principle of this embodiment is as follows: by connecting an external power supply to the power connector 601, the test fixture can be powered, and the power supply status can be controlled by the power button 6. When testing, place the circuit board on the mold 7, and place the wiring socket of the circuit board in the placement slot 701. Turning the handle 301 drives the eccentric rod 302 to flip, so that the connecting rod 303 will drive the lifting rod 304 to move along the axial direction of the sliding sleeve 305, thereby driving the lifting plate 311 to move up and down. When the lifting plate 311 descends, it will drive the pressing plate 308 to move downward, thereby causing the spring probe 310 to descend, so that the spring probe 310 contacts the test point on the circuit board. After the spring probe 310 contacts the circuit board, continuing to move the pressing plate 308 downward will compress the first spring 309. The first spring 309 applies pressure to the pressing plate 308, so that the spring probe 310 can be in firm contact with the circuit board to prevent loosening;

[0034] When the lifting plate 311 descends, the roller 402 will move downward, and the roller 402 will squeeze the driving block 403, so that the driving block 403 moves horizontally toward the direction close to the electric board, thereby driving the plug 404 to move toward the direction close to the circuit board socket, and then the plug 404 is combined with the socket of the circuit board to complete the connection. When the lifting plate 311 rises, the roller 402 rises and will no longer squeeze the driving block 403. At this time, the driving block 403 is reset under the action of the second spring 407, so that the plug 404 is separated from the socket of the circuit board.

[0035] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A multi-cycle square wave test fixture, comprising a base (1), a support column (2) fixedly mounted on the base (1), and a mounting plate (201) fixedly mounted on the support column (2), characterized in that: Also includes: A lifting drive mechanism is arranged on the mounting plate (201), a pressing plate (308) is installed on the lifting drive mechanism, a plurality of spring probes (310) are installed on the pressing plate (308), a mold (7) for placing a circuit board is installed on the base (1), a placement groove (701) for placing a circuit board socket is provided on the mold (7), and the lifting drive mechanism drives the spring probes (310) to flexibly fix the circuit board; A plug-in mechanism is installed on a base (1) and connected to a lifting drive mechanism. A plug (404) connected to a socket of a circuit board is installed on the plug-in mechanism. When the lifting mechanism drives the spring probe (310) to descend, the plug-in mechanism drives the plug (404) to connect with the socket of the circuit board. When the spring probe (310) rises, the plug (404) is disengaged from the socket of the circuit board.

2. A multi-cycle square wave test fixture according to claim 1, characterized in that: The lifting mechanism comprises a connecting seat (3) fixedly mounted on a mounting plate (201), a handle (301) rotatably mounted on the connecting seat (3), an eccentric rod (302) fixedly mounted on the handle (301), a connecting rod (303) rotatably mounted on the eccentric rod (302), a lifting rod (304) rotatably mounted on the connecting rod (303), and a sliding sleeve (305) fixedly mounted on the connecting seat (3); the lifting rod (304) is slidably connected to the sliding sleeve (305); a lifting plate (311) is fixedly mounted on the lifting rod (304); a plurality of first springs (309) are fixedly mounted on the lifting plate (311); and the pressing plate (308) is fixedly mounted on one end of the first spring (309).

3. A multi-cycle square wave test fixture according to claim 2, characterized in that: A plurality of slide bars (306) are fixedly mounted on the lifting plate (311), a limit block (307) is fixedly mounted on the slide bar (306), the pressing plate (308) is slidably connected to the slide bar (306), and the pressing plate (308) abuts against the limit block (307) under the action of a first spring (309).

4. A multi-cycle square wave test fixture according to claim 3, characterized in that: A plurality of columns (5) are fixedly mounted on the base (1), and the lifting plate (311) is slidably connected to the columns (5).

5. A multi-cycle square wave test fixture according to claim 2, characterized in that: The plug-in mechanism comprises a support rod (4) fixedly mounted on the lifting plate (311), a connecting rod (401) fixedly mounted on the support rod (4), a roller (402) rotatably mounted on the connecting rod (401) and a driving block (403) slidably mounted on the base (1), and the plug (404) is fixedly mounted on the driving block (403).

6. A multi-cycle square wave test fixture according to claim 5, characterized in that: The base (1) is provided with a slide groove (405), the driving block (403) is fixedly mounted with a slider (406), the slider (406) is slidably connected to the slide groove (405), a second spring (407) is fixedly mounted in the slide groove (405), and the other end of the second spring (407) is fixedly connected to the slider (406).

7. A multi-cycle square wave test fixture according to claim 5, characterized in that: The driving block (403) is triangular in shape, and the roller (402) abuts against the inclined surface of the driving block (403).

8. The multi-cycle square wave test fixture according to claim 1, characterized in that: The base (1) is provided with a power connector (601) and a power button (6).

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