Micrometer Measuring Fixture

Abstract

The present invention discloses a micrometer measuring fixture, which includes a base and a micrometer. A limit groove is provided on the top surface of the base, and a positioning hole communicating with the side surface of the limit groove is provided on each of the two side surfaces of the base. The two positioning holes are symmetrically arranged; the micrometer is arranged below the base, and the micrometer has two opposing thimbles, and the two thimbles are respectively inserted into the two positioning holes. The structure of this micrometer measuring fixture is simple and convenient for production and assembly; by inserting the two thimbles of the micrometer into the positioning holes on both sides of the base and allowing the micrometer to fall naturally, the micrometer can be kept perpendicular to the circuit board to be measured. At this time, by rotating the rotating handle of the micrometer, the distance between the two thimbles can be reduced until the two thimbles contact the circuit board to be measured in the limit groove to complete the measurement. The operation process is fast and stable, which is beneficial to improving the measurement efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of caliper measurement fixtures, and particularly to micrometer measurement fixtures. Background Art

[0002] In the prior art, after the circuit board is produced, its external dimensions need to be measured to ensure the product yield. Currently, the size detection of the circuit board is carried out by a caliper. When measuring some circuit boards, the micrometer should be made perpendicular to the circuit board as much as possible. However, due to different operating methods of each person, there will be a slight deviation in the detection position and angle, resulting in a relatively large error in the caliper measurement result. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to provide a micrometer measurement fixture that can easily make the caliper perpendicular to the circuit board to be measured.

[0004] To solve the above technical problem, the technical solution adopted by the present invention is: a micrometer measurement fixture, including a base and a micrometer. A limiting groove is provided on the top surface of the base, and a positioning hole communicating with the side surface of the limiting groove is provided on each of the two side surfaces of the base. The two positioning holes are symmetrically arranged; the micrometer is arranged below the base, and the micrometer has two opposing thimbles, and the two thimbles are respectively inserted into the two positioning holes.

[0005] The beneficial effect of the present invention is: the structure of the micrometer measurement fixture of the present invention is simple and convenient for production and assembly; by inserting the two thimbles of the micrometer into the positioning holes on both sides of the base, the micrometer can fall naturally, so that the micrometer can be kept perpendicular to the circuit board to be measured. At this time, by rotating the rotating handle of the micrometer, the distance between the two thimbles can be reduced until the two thimbles touch the circuit board to be measured in the limiting groove to complete the measurement. The operation process is fast and stable, which is beneficial to improving the measurement efficiency and accuracy. Brief Description of the Drawings

[0006] Figure 1 Schematic diagram of the overall structure of the micrometer measurement fixture according to Embodiment 1 of the present invention Figure 1 ;

[0007] Figure 2 Schematic diagram of the overall structure of the micrometer measurement fixture according to Embodiment 1 of the present invention Figure 2 ;

[0008] Figure 3 Schematic diagram of the overall structure of the micrometer measurement fixture according to Embodiment 1 of the present invention Figure 3 .

[0009] Label Description:

[0010] 1. Base; 11. Fixture body; 111. Limit groove; 112. Positioning hole; 113. Assembly groove; 114. Mounting hole; 12. Stopper block

[0011] 2. Micrometer

[0012] 3. Limit gasket; 31. Relief structure

[0013] 4. Limiting member; 41. Knob; 42. Anti-slip structure

[0014] 5. Fixed block

[0015] 6. Foot

[0016] 7. Circuit board Detailed implementation manner

[0017] To describe in detail the technical content, achieved purpose and effects of the present invention, the following is described in conjunction with the implementation manners and with reference to the drawings

[0018] Please refer to Figures 1 to 3 , a micrometer measuring fixture, including a base 1 and a micrometer 2. A limit groove 111 is provided on the top surface of the base 1, and a positioning hole 112 communicating with the side surface of the limit groove 111 is provided on each of the two side surfaces of the base 1. The two positioning holes 112 are symmetrically arranged; the micrometer 2 is arranged below the base 1, and the micrometer 2 has two opposing thimble, and the two thimbles are respectively inserted into the two positioning holes 112

[0019] As can be seen from the above description, the beneficial effects of the present invention are as follows: The structure of this micrometer measuring fixture is simple, which is convenient for production and assembly; by inserting the two thimbles of the micrometer 2 into the positioning holes 112 on both sides of the base 1 and letting the micrometer 2 hang down naturally, the micrometer 2 can be kept perpendicular to the circuit board 7 to be measured. At this time, by rotating the rotating handle of the micrometer 2, the distance between the two thimbles can be reduced until the two thimbles contact the circuit board 7 to be measured in the limit groove 111 to complete the measurement. The operation process is fast and stable, which is beneficial to improving the measurement efficiency and accuracy

[0020] Furthermore, an inwardly concave assembly groove 113 is provided on the side surface of the base 1, and the positioning hole 112 is provided on the bottom surface of the assembly groove 113

[0021] As can be seen from the above description, the inwardly concave assembly groove 113 can enable the base 1 to have sufficient width to maintain the structural strength, and at the same time reduce the minimum distance required for the two thimbles of the micrometer 2 to be inserted into the positioning holes 112, which is convenient for disassembling and assembling the micrometer 2

[0022] Further, it further includes a limit gasket 3, the limit gasket 3 is detachably connected to the bottom surface of the assembly groove 113, and the limit gasket 3 is provided with a clearance structure 31 corresponding to the positioning hole 112.

[0023] As can be seen from the above description, by snapping the limit gasket 3 into the assembly groove 113, the distance that the micrometer 2 needs to expand to withdraw from the positioning hole 112 can be increased, thereby reducing the risk of the micrometer 2 accidentally falling off the base 1 during use.

[0024] Further, it further includes a limiting member 4. An installation hole 114 communicating with the side surface of the limiting groove 111 is further opened on the side surface of the base 1. The limiting member 4 penetrates through the installation hole 114, and an internal thread portion is provided in the installation hole 114. The limiting member 4 is provided with an external thread portion that cooperates with the internal thread portion.

[0025] As can be seen from the above description, the limiting member 4 can extend into the limiting groove 111 to abut against the circuit board 7 to be measured, so that the circuit board 7 abuts against the side surface of the limiting groove 111 away from the limiting member 4, thereby realizing the positioning of the circuit board 7 in the width direction.

[0026] Further, a knob 41 is provided at one end of the limiting member 4 away from the limiting groove 111, and an anti-slip structure 42 is provided on the outer peripheral surface of the knob 41.

[0027] As can be seen from the above description, the knob 41 and the anti-slip structure 42 can facilitate the operator to rotate the limiting member 4, so that the limiting member 4 approaches or moves away from the circuit board 7 to be measured.

[0028] Further, a fixing block 5 is provided on the side surface of the base 1, and the installation hole 114 is provided on the fixing block 5.

[0029] As can be seen from the above description, the fixing block 5 can increase the length of the installation hole 114, which is beneficial to improving the perpendicularity of the axial direction of the limiting member 4 in the installation hole 114 to the length direction of the limiting groove 111, and at the same time reducing the risk of the limiting member 4 accidentally withdrawing from the installation hole 114.

[0030] Further, the base 1 and the fixing block 5 are connected by a card slot, screwed, welded or integrally formed.

[0031] As can be seen from the above description, the base 1 and the fixing block 5 can select different connection methods according to different production conditions or usage requirements.

[0032] Further, one end of the limiting groove 111 communicates with the end face of the base 1.

[0033] As described above, one end of the limiting groove 111 is open, which facilitates the operator to apply force to one end of the circuit board 7 to be measured, so that the other end of the circuit board 7 abuts against the end face of the limiting groove 111 to realize the positioning of the circuit board 7 in the length direction.

[0034] Further, the base 1 includes a jig body 11 and a stopper 12. The top surface of the jig body 11 is provided with the limiting groove 111, and the limiting groove 111 communicates with the two end faces of the jig body 11. The stopper 12 is fixedly connected to one end of the jig body 11 and blocks one end opening of the limiting groove 111.

[0035] As described above, splitting the base 1 into the jig body 11 and the stopper 12 to make the limiting groove 111 a through groove is beneficial to reducing the cutting processing difficulty of the limiting groove 111 and improving the dimensional accuracy of the limiting groove 111.

[0036] Further, the bottom of the base 1 is provided with supporting feet 6, and a window communicating with the bottom surface of the base 1 is opened on the bottom surface of the limiting groove 111.

[0037] As described above, the operator can jack up the circuit board 7 in the limiting groove 111 through the window to facilitate removing the circuit board 7 or turning over the circuit board 7.

[0038] Embodiment 1

[0039] Please refer to Figures 1 to 3 , Embodiment 1 of the present invention is: a micrometer measuring jig, which can be applied to measure the external dimensions of the circuit board 7.

[0040] The micrometer measuring jig includes a base 1 and a micrometer 2. The top surface of the base 1 is provided with a limiting groove 111, and a positioning hole 112 communicating with the side surface of the limiting groove 111 is provided on each of the two side surfaces of the base 1. The two positioning holes 112 are symmetrically arranged; the micrometer 2 is arranged below the base 1, and the micrometer 2 has two opposing thimbles, and the two thimbles are respectively inserted into the two positioning holes 112. Specifically, the limiting groove 111 is set as a rectangular groove corresponding to the shape of the circuit board 7 to be measured. The positions of the two positioning holes 112 are symmetrical, and the axial directions of the two positioning holes 112 are perpendicular to the length direction of the limiting groove 111. Since the thickness of the circuit board 7 is smaller than the diameter of the thimble of the micrometer 2, in this embodiment, a concave first clearance groove is provided on the bottom surface of the limiting groove 111, and the length direction of the first clearance groove is perpendicular to the length direction of the limiting groove 111. The two positioning holes 112 are respectively arranged at both ends of the first clearance groove to avoid excessive depth of the limiting groove 111 and inconvenient cutting and forming.

[0041] Preferably, as Figure 1As shown, one end of the limiting groove 111 communicates with the end face of the base 1. Specifically, after the circuit board 7 is placed in the limiting groove 111, an operator can apply a thrust to one end of the circuit board 7, so that the circuit board 7 abuts against the end face of the limiting groove 111, and the positioning of the circuit board 7 in the length direction can be completed.

[0042] Specifically, as Figure 2 shown, the base 1 includes a fixture main body 11 and a stop block 12. The top surface of the fixture main body 11 is provided with the limiting groove 111. The limiting groove 111 communicates with both end faces of the fixture main body 11. The stop block 12 is fixedly connected to one end of the fixture main body 11 and blocks one end opening of the limiting groove 111. The fixture main body 11 and the stop block 12 are connected by screws. It is easy to understand that when the fixture main body 11 is processed and formed, the cutting tool can pass through the fixture main body 11 without staying or changing direction, which is beneficial to ensuring the flatness of the side and bottom surfaces of the limiting groove 111. And after the fixture main body 11 and the stop block 12 are connected, the corner of the limiting groove 111 is a right angle, which can be adapted to the shape of the circuit board 7.

[0043] Preferably, as Figure 2 shown, the side surface of the base 1 is provided with a concave assembly groove 113, and the positioning hole 112 is opened on the bottom surface of the assembly groove 113. Specifically, both ends of the assembly groove 113 communicate with the top surface and the bottom surface of the base 1. The concave assembly groove 113 can reduce the minimum distance required for the two thimbles of the micrometer 2 to be inserted into the positioning hole 112, which is convenient for disassembling and assembling the micrometer 2. It is easy to understand that if the overall width of the base 1 is reduced, the width of the two side walls of the limiting groove 111 is thinner, and the structural strength is low, and the base 1 is easily damaged.

[0044] Preferably, as Figure 1 and Figure 3 shown, the micrometer measuring fixture further includes a limiting gasket 3. The limiting gasket 3 is detachably connected to the bottom surface of the assembly groove 113, and a clearance structure 31 corresponding to the positioning hole 112 is provided on the limiting gasket 3. Specifically, the thimble includes a fixed thimble and a movable thimble. The number of the limiting gaskets 3 is one. In this embodiment, the limiting gasket 3 is snapped into the assembly groove 113 close to the movable thimble. The limiting gasket 3 abuts against the micrometer 2, which will drive the fixed thimble to move inward a certain distance, so as to increase the distance between the two thimbles when the micrometer 2 exits the positioning hole 112, and reduce the risk of the micrometer 2 accidentally falling off the base 1. In this embodiment, the clearance structure 31 is set as a notch, and the notch communicates with the side surface of the limiting gasket 3, so as to facilitate the limiting gasket 3 to be snapped into the space between the assembly groove 113 and the micrometer 2. The limiting gasket 3 and the base 1 are connected by screws.

[0045] Preferably, as Figure 1 and Figure 2As shown in the figure, the micrometer measuring fixture further includes a limiting member 4. An installation hole 114 communicating with the side surface of the limiting groove 111 is further formed in the side surface of the base 1. The limiting member 4 penetrates through the installation hole 114, and an internal thread portion is provided in the installation hole 114. An external thread portion cooperating with the internal thread portion is provided on the limiting member 4. A knob 41 is provided at one end of the limiting member 4 away from the limiting groove 111, and an anti-slip structure 42 is provided on the outer peripheral surface of the knob 41. The axial direction of the installation hole 114 is perpendicular to the length direction of the limiting groove 111. In this embodiment, the limiting member 4 is preferably a bolt, and the anti-slip structure 42 is preferably a plurality of rectangular grooves evenly distributed around the circumference of the limiting member 4. A second clearance groove for avoiding the limiting member 4 is provided at the bottom of the limiting groove 111 corresponding to the installation hole 114. Specifically, after the circuit board 7 is placed in the limiting groove 111, one end of the circuit board 7 is made to abut against the end surface of the limiting groove 111. Subsequently, the limiting member 4 is rotated through the knob 41, so that the limiting member 4 moves towards the direction close to the circuit board 7 until it abuts against the circuit board 7, so that the circuit board 7 abuts against the side surface of the limiting groove 111 away from the limiting member 4 under the action of the limiting member 4, and the positioning of the circuit board 7 in the length and width directions can be completed. Relying on the self-locking ability of the internal thread portion and the external thread portion, the circuit board 7 can be kept in the current position, ensuring the stability of the test process and liberating the hands of the operator.

[0046] Preferably, as Figure 1 shown, a fixing block 5 is provided on the side surface of the base 1, and the installation hole 114 is provided on the fixing block 5. It is easy to understand that the setting of the fixing block 5 will extend the length of the installation hole 114, thereby reducing the risk that the limiting member 4 accidentally exits the installation hole 114 during use.

[0047] Optionally, the base 1 is connected to the fixing block 5 by slot connection, screw connection, welding or integral molding. In this embodiment, the fixing block 5 is screwed to the fixture main body 11.

[0048] Preferably, as Figure 3 shown, feet 6 are provided at the bottom of the base 1, and a window communicating with the bottom surface of the base 1 is opened on the bottom surface of the limiting groove 111. In this embodiment, the number of feet 6 is two, symmetrically arranged at both ends of the base 1. The feet 6 include a first section, a second section and a third section connected in sequence; the first section, the second section and the third section are formed by bending a same metal sheet. Among them, the first section is perpendicular to the second section, and the second section is perpendicular to the third section. The first section is screwed to the bottom surface of the fixture main body 11; the third section bends and extends towards the outside, and the surface of the third section away from the first section is a placement surface; two connection holes are provided at intervals on the third section, so that this micrometer measuring fixture can be screwed to the workbench. The window is in a rounded rectangle shape. The edge of the window is provided with rounded corners to prevent burrs from affecting the positioning of the circuit board 7 in the height direction and scratching the hands of the operator.

[0049] In summary, the micrometer measuring fixture provided by the present invention has a simple structure and is convenient for production and assembly. By clamping the two thimble pins of the micrometer into the positioning holes on both sides of the base and allowing the micrometer to hang naturally, the micrometer can be kept perpendicular to the circuit board to be measured. At this time, by rotating the rotating handle of the micrometer, the distance between the two thimble pins can be reduced until the two thimble pins touch the circuit board to be measured in the limit groove to complete the measurement. The operation process is fast and stable, which is beneficial to improving the measurement efficiency and accuracy.

[0050] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, shall be equally included in the patent protection scope of the present invention.

Claims

1. Micrometer measuring fixture, characterized in that: It includes a base and a micrometer. A limiting groove is provided on the top surface of the base, and a positioning hole communicating with the side surface of the limiting groove is provided on each of the two side surfaces of the base. The two positioning holes are symmetrically arranged. The micrometer is arranged below the base. The micrometer has two oppositely arranged thimbles, and the two thimbles are respectively inserted into the two positioning holes. The micrometer naturally hangs down to keep the micrometer perpendicular to the circuit board to be measured.

2. The micrometer measuring fixture according to claim 1, wherein: An inwardly concave assembly groove is provided on the side surface of the base, and the positioning hole is opened on the bottom surface of the assembly groove.

3. The micrometer measuring fixture according to claim 2, characterized in that: It further includes a limiting gasket. The limiting gasket is detachably connected to the bottom surface of the assembly groove, and an avoidance structure corresponding to the positioning hole is provided on the limiting gasket.

4. The micrometer measuring fixture according to claim 1, wherein: It further includes a limiting member. An installation hole communicating with the side surface of the limiting groove is further opened on the side surface of the base. The limiting member penetrates through the installation hole, and an internal thread portion is provided in the installation hole. An external thread portion matching the internal thread portion is provided on the limiting member.

5. The micrometer measuring fixture according to claim 4, characterized in that: A knob is provided at one end of the limiting member away from the limiting groove, and an anti-slip structure is provided on the outer peripheral surface of the knob.

6. The micrometer measuring fixture according to claim 4, characterized in that: A fixing block is provided on the side surface of the base, and the installation hole is provided on the fixing block.

7. The micrometer measuring fixture according to claim 6, wherein: The base is connected to the fixing block by card slot connection, screw connection, welding or integral molding.

8. The micrometer measuring fixture according to claim 1, characterized in that: One end of the limiting groove communicates with the end surface of the base.

9. The micrometer measuring fixture according to claim 8, wherein: The base includes a jig main body and a stopper. The limiting groove is provided on the top surface of the jig main body. The limiting groove communicates with the two end surfaces of the jig main body. The stopper is fixedly connected to one end of the jig main body and blocks one end opening of the limiting groove.

10. The micrometer measuring fixture according to claim 1, characterized in that: Support feet are provided at the bottom of the base, and a window communicating with the bottom surface of the base is opened on the bottom surface of the limiting groove.

Images