Distance-adjustable high-holding-force variable claw type printed board pulling mechanism

Abstract

The invention discloses a distance-adjustable high-holding-force variable claw type printed board pulling mechanism which comprises a holding rod, longitudinal distance adjusting rods, transverse distance adjusting rods, a rotating shaft, claw fixing strips and deformation claws, the four deformation claws are fixedly connected with the four claw fixing strips respectively, every two claw fixing strips are fixedly connected to the two sides of one longitudinal distance adjusting rod, and the transverse distance adjusting rods are fixedly connected with the rotating shaft. Each longitudinal distance adjusting rod is provided with two transverse distance adjusting rods through a rotating shaft, two sliding blocks are embedded in the holding rod, the four transverse distance adjusting rods are connected end to end, and the end-to-end connection intersection points are sequentially located on one longitudinal distance adjusting rod, one sliding block embedded in the holding rod, the other longitudinal distance adjusting rod and the other sliding block embedded in the holding rod. The device has the main advantages of being adjustable in distance, accessible in small gap, large in grasping force, flexible, expandable, foldable and capable of achieving small-gap grabbing, and has the stepless distance adjusting performance.

Description

Technical Field

[0001] The invention belongs to the technical field of printed circuit board extraction mechanisms, and in particular relates to an adjustable-distance, high-holding-force, variable-claw type printed circuit board extraction mechanism. Background Art

[0002] At present, many electronic products usually try to reduce the gap between the side wall of the structural box and the side of the printed circuit board as much as possible to make the overall product smaller and more compact. For products that require the installation of multi-layer printed circuit boards, the removal of the printed circuit boards during subsequent testing and maintenance becomes a problem. If inter-board connectors are used between printed circuit boards, it makes the removal of the printed circuit boards even more difficult.

[0003] like Figure 1 As shown, in the double-layer printed circuit board box structure, the gap between the printed circuit board 1 and the side wall of the box body 2 is only 1 mm, and there is an inter-board connector between the two layers of printed circuit boards 1. After installation and debugging, it is impossible to use conventional tools to remove the printed circuit boards 1 for subsequent protective treatment. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an adjustable distance high holding force variable claw type printed circuit board extraction mechanism, which can not only realize small gap lowering claws, but also has stepless distance adjustment characteristics.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] The invention discloses an adjustable-distance high-holding-force variable-claw printed circuit board extraction mechanism, comprising a gripping rod, a longitudinal pitch-adjusting rod, a transverse pitch-adjusting rod, a rotating shaft, a claw fixing bar, and a deformable claw. Four deformable claws are respectively fixedly connected to four claw fixing bars, and every two claw fixing bars are fixedly connected to both sides of a longitudinal pitch-adjusting rod. Two transverse pitch-adjusting rods are installed on each longitudinal pitch-adjusting rod through a rotating shaft. Two sliders are embedded in the gripping rod. The four transverse pitch-adjusting rods are connected end to end, and the intersection points where the four transverse pitch-adjusting rods are connected end to end are located in sequence at one longitudinal pitch-adjusting rod, a slider embedded in the gripping rod, another longitudinal pitch-adjusting rod, and another slider embedded in the gripping rod.

[0007] Furthermore, the longitudinal pitch-adjusting rod comprises a double inner rod and an outer rod, and the double inner rod is used for reverse withdrawal to increase the length of the longitudinal pitch-adjusting rod.

[0008] Furthermore, the double inner rods and the outer rods are both provided with a series of threaded holes, the outer rods are provided with scales and pre-embedded nuts, and the inner rods are limited by a top bead when they are slid and pulled out.

[0009] Furthermore, the mounting surface of the claw fixing strip has an oblong hole, the connecting surface has a captive screw, the oblong hole is nailed through the nail and fastened with the series threaded holes of the longitudinal pitch adjusting rod, and the deformable claw is screwed and fastened with the claw fixing strip through the captive screw of the claw fixing strip.

[0010] Furthermore, each longitudinal distance adjusting rod is equipped with two back-to-back installed transverse distance adjusting rods to form a set of two-way distance adjusting mechanisms. One grip rod is equipped with two sets of two-way distance adjusting mechanisms. The four transverse distance adjusting rods contained in the two sets of two-way distance adjusting mechanisms are assembled back to back in pairs and are fastened with screws and rotating shafts and two sliders embedded in the grip rod.

[0011] Furthermore, each set of two-way distance adjustment mechanisms is increased with two transverse distance adjustment rods and a grip rod, and the two transverse distance adjustment rods are fastened with the reserved back nut screws of the longitudinal distance adjustment rod through screws and a rotating shaft to form an extended two-way distance adjustment mechanism.

[0012] Furthermore, the deformable claw is divided into a fixed side and a deformable side, the fixed side includes a sliding groove, and a fixing nail is used to pass through the sliding groove of the fixed side and the through hole of the deformable side.

[0013] Furthermore, when the triangle is formed, the fixing pin is pressed to keep the deformed claw in the grasping shape; when the fixing pin is released, the shape of the deformed side is changed by moving the fixing pin in the sliding groove of the deformed side, and the fixing pin is pressed when the deformed claw is adjusted to the required thickness, so that the deformed claw maintains the lower claw shape.

[0014] Furthermore, when the inner and outer rods of the longitudinal distance adjusting rod overlap to the shortest state and the two longitudinal distance adjusting rods are pushed closer together, the printed circuit board extraction mechanism is in a foldable state.

[0015] Furthermore, the deformable claw body is formed by bending high-quality carbon structural steel strip, the grip rod is made of aluminum profile, and the rotating shaft is made of non-metallic wear-resistant material.

[0016] The beneficial effects of the present invention are:

[0017] The length of the longitudinal distance-adjusting rod is adjustable, and the angle of the transverse distance-adjusting rod is adjustable, so as to realize infinite adjustment of the longitudinal and transverse distances of the deformable claws; after the deformable claws are processed and formed, they can be deformed into double-layer thin strips by stretching, and restore the formed structure after passing through a small gap; the deformable claws are bent into stable triangles and can withstand large extrusion pressure; the longitudinal distance-adjusting rod has spare mounting nuts, which can be expanded and installed with transverse adjustment rods and grip rods as needed; through the height gap design, the folding of all rods is minimized for easy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of a double-layer printed circuit board box in the prior art;

[0019] Figure 2 A schematic diagram of a folding of a high-holding force variable claw type printed circuit board extraction mechanism with adjustable distance provided by the present invention;

[0020] Figure 3 A diagram showing the use status of an adjustable distance high holding force variable claw type printed circuit board extraction mechanism provided by the present invention;

[0021] Figure 4 It is a front view of a printed circuit board extraction mechanism with adjustable distance and high holding force and variable claws in use;

[0022] Figure 5 It is a side view of a printed circuit board extraction mechanism with adjustable distance, high holding force and variable claws in use;

[0023] Figure 6 It is a bottom view of a printed circuit board extraction mechanism with adjustable distance, high holding force and variable claws in use;

[0024] Figure 7 A schematic diagram of an extended state of an adjustable distance high holding force variable claw type printed circuit board extraction mechanism provided by the present invention;

[0025] Figure 8 This is the state diagram of the deformed claw;

[0026] Fig. 9 The stress cloud diagram of the deformed claw in use state;

[0027] Fig.10 The present invention is a schematic diagram of the application of an adjustable distance high holding force variable claw type printed circuit board extraction mechanism.

[0028] Reference numerals:

[0029] 1. Printed circuit board, 2. Box body, 3. Deformation claw, 4. Claw fixing bar, 5. Longitudinal distance adjusting rod, 6. Horizontal distance adjusting rod, 7. Grip rod, 8. Rotating shaft. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 2-Figure 3 FIG. 1 is a schematic diagram of a high-holding force variable claw type printed circuit board extraction mechanism with adjustable distance provided by the present invention, wherein the mechanism comprises:

[0032] A gripping rod 7, two longitudinal pitch-adjusting rods 5, four transverse pitch-adjusting rods 6, four rotating shafts 8, four claw fixing strips 4, four deformable claws 3, and all structural parts are connected by screw connection;

[0033] The mounting surface of the claw fixing strip 4 is provided with an oblong hole, and the connecting surface is provided with a captive screw, and the oblong hole is nailed and fastened with a series of threaded holes of the longitudinal pitch adjusting rod 5 to achieve installation, and the deformable claw 3 is screwed and fastened with the claw fixing strip 4 through the captive screw provided by the claw fixing strip 4;

[0034] The longitudinal distance adjusting rod 5 is composed of a double inner rod and an outer rod. The inner rod can be pulled out to increase the overall length of the longitudinal distance adjusting rod 5. Both the inner and outer rods have a series of threaded holes. The outer rod has a scale and a nut embedded in the outer rod. The inner rod has a buckle and can be slid out and limited by a top bead. The claw fixing strip 4 is fastened to the series of threaded holes of the longitudinal distance adjusting rod 5 by screws. The threaded holes can be selected according to the scale of the longitudinal distance adjusting rod 5 according to the size of the printed circuit board. If the size of the printed circuit board exceeds the length of the outer rod of the longitudinal distance adjusting rod 5, the inner rod of the longitudinal distance adjusting rod 5 can be pulled out and limited by a top bead before the claw fixing strip 4 is fixed to the inner rod of the longitudinal distance adjusting rod 5. Two claw fixing strips 4 and two deformable claws 3 are evenly arranged on each longitudinal distance adjusting rod 5 (because each deformable claw 3 corresponds to the claw fixing strip 4 one by one).

[0035] like Figure 4-Figure 6 , three views of an adjustable high-holding force variable claw type printed circuit board extraction mechanism in use are respectively given to more clearly illustrate the structure of the present invention. The gripping rod 7 has sealing covers at both ends, and two sliders with nuts are embedded in it; the transverse distance adjusting rod 6 has round holes at both ends, one end is fastened and installed with one of the sliders embedded in the gripping rod 7 through screws and the rotating shaft 8, and the other end is fastened and installed with the nut pre-buried in the longitudinal distance adjusting rod 5 through screws and the rotating shaft 8; each longitudinal distance adjusting rod 5 is equipped with two transverse distance adjusting rods 6 installed in reverse to form a set of two-way distance adjusting mechanisms, that is, a set of two-way distance adjusting mechanisms includes a longitudinal distance adjusting rod 5 and two transverse distance adjusting rods 6, preferably, one end of the two transverse distance adjusting rods 6 installed in reverse to each other overlaps at the middle position of the longitudinal distance adjusting rod 5 through screws and the rotating shaft 8, and the other end of the two transverse distance adjusting rods 6 installed in reverse to each other are respectively adapted and installed with the two sliders embedded in the gripping rod 7.

[0036] The gripping rod 7 is equipped with two sets of bidirectional distance-adjusting mechanisms, which include four transverse distance-adjusting rods 6 in total. The four transverse distance-adjusting rods 6 are assembled in pairs with their backs to each other and are fastened with screws and a rotating shaft 8 and a slider embedded in the gripping rod 7. That is, the four transverse distance-adjusting rods 6 are assembled end to end in sequence, and the intersection of the end to end is located at a longitudinal distance-adjusting rod 5, a slider embedded in the gripping rod 7, another longitudinal distance-adjusting rod 5, and another slider embedded in the gripping rod 7 in sequence.

[0037] As described above, the structure of the present invention can infinitely adjust the claw distance in the horizontal and vertical directions, and the lengths of all rods can be customized in series, corresponding to the use of printed circuit boards with a larger size range.

[0038] A set of two-way distance adjustment mechanism can be increased by two transverse distance adjustment rods 6, which are fastened with the reserved back nut of the longitudinal distance adjustment rod 5 through the through screws and the rotating shaft 8 to form an extended two-way distance adjustment mechanism. Figure 7As shown in the figure, the extended bidirectional distance adjustment mechanism includes a longitudinal distance adjustment rod 5 and four transverse distance adjustment rods 6. The transverse distance adjustment rods 6 are divided into groups A and B according to different connection nuts with the longitudinal distance adjustment rod 5. Both groups A and B have two transversely mounted distance adjustment rods 6 that are respectively connected to two holding rods 7. The two transverse distance adjustment rods 6 in each group are respectively connected to two sliders of the same holding rod 7, forming an extended form of the printed circuit board extraction mechanism.

[0039] As Figure 8 shown in the figure, the deformable claw 3 is provided with a claw-shaped fixing nail, and there is a threaded hole at the installation end. The deformable claw 3 is divided into a fixed side and a deformable side. The fixed side includes a sliding groove. The fixing nail passes through the sliding groove on the fixed side and the through hole on the deformable side. When the triangular forming state is reached and the fixing nail is pressed tightly, the deformable claw 3 can be kept in the grasping state. When the fixing nail is relaxed, the fixing nail and the deformable side can be moved in the sliding groove on the deformable side. When the deformable claw 3 is adjusted to the appropriate thickness and the fixing nail is pressed tightly, the deformable claw 3 can be kept in the lower claw state.

[0040] When the inner and outer rods of the longitudinal distance adjustment rod 5 coincide to the shortest state and the two longitudinal distance adjustment rods 5 are pushed closer, the printed circuit board extraction mechanism can be folded, that is Figure 2 the retracted state shown in the figure, which is convenient for storage.

[0041] Furthermore, the body of the deformable claw 3 is formed by bending high-quality carbon structural steel strips, the holding rod 7 is made of mature aluminum profiles, the rotating shaft 8 is made of non-metallic wear-resistant materials, and the remaining structural parts are all formed by bending and welding stainless steel plates.

[0042] Fig. 9 Fig. is the stress nephogram of the deformable claw 3 when grasping the printed circuit board. Assuming that a single claw is subjected to a force of 10 N, the maximum stress of the structure is 350 MPa, which is much smaller than the material yield stress of 650 MPa.

[0043] Fig.10 Fig. is the application schematic diagram of an adjustable-distance and high-holding-force variable-claw-type printed circuit board extraction mechanism of the present invention. It can be seen that the space it occupies is not large, and it is more suitable for engineering applications.

[0044] The above specific embodiments have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable distance high holding force variable claw type printed circuit board extraction mechanism, comprising a gripping rod, a longitudinal distance adjusting rod, a transverse distance adjusting rod, a rotating shaft, a claw fixing strip, and a deformable claw, characterized in that: The four deformable claws are fixedly connected to four claw fixing bars respectively, and every two claw fixing bars are fixedly connected to both sides of a longitudinal distance adjusting rod. Each longitudinal distance adjusting rod is equipped with two transverse distance adjusting rods through a rotating shaft, and two sliders are embedded in the gripping rod. The four transverse distance adjusting rods are connected end to end and the intersection points where the four transverse distance adjusting rods are connected end to end are located in sequence at a longitudinal distance adjusting rod, a slider embedded in the gripping rod, another longitudinal distance adjusting rod, and another slider embedded in the gripping rod.

2. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 1 is characterized in that: The longitudinal pitch rod comprises a double inner rod and an outer rod. The double inner rod is used for reverse extraction to increase the length of the longitudinal pitch rod.

3. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 2, characterized in that: The double inner rods and the outer rods are both provided with a series of threaded holes, the outer rods are provided with scales and pre-embedded nuts, and the inner rods are limited by top beads when they are slid and pulled out.

4. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 1, characterized in that: The mounting surface of the claw fixing strip is provided with an oblong hole, and the connecting surface is provided with a captive screw. The oblong hole is nailed through and fastened with a series of threaded holes of the longitudinal pitch adjusting rod. The deformable claw is screwed and fastened with the claw fixing strip through the captive screw provided with the claw fixing strip.

5. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 1, characterized in that: Two transverse distance adjusting rods installed in back-to-back relation are installed on each longitudinal distance adjusting rod to form a set of two-way distance adjusting mechanisms. Two sets of two-way distance adjusting mechanisms are installed on one gripping rod. The four transverse distance adjusting rods contained in the two sets of two-way distance adjusting mechanisms are assembled in back-to-back relation in pairs and are fastened with screws and rotating shafts and two sliding blocks embedded in the gripping rod.

6. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 5, characterized in that: Each set of two-way distance adjustment mechanism adds two transverse distance adjustment rods and a grip rod. The two transverse distance adjustment rods are fastened with the reserved back nut of the longitudinal distance adjustment rod through screws and a rotating shaft to form an extended two-way distance adjustment mechanism.

7. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 1, characterized in that: The deformable claw is divided into a fixed side and a deformable side. The fixed side includes a sliding groove, and a fixing nail is used to pass through the sliding groove of the fixed side and the through hole of the deformable side.

8. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 7, characterized in that: When the triangle is in the forming state, the fixing pin is pressed to keep the deformed claw in the grasping shape; when the fixing pin is loosened, the shape of the deformed side is changed by moving the fixing pin in the sliding groove on the deformed side, and the fixing pin is pressed when the deformed claw is adjusted to the required thickness to keep the deformed claw in the lower claw shape.

9. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 1, characterized in that: When the inner and outer rods of the longitudinal distance adjusting rod overlap to the shortest state and the two longitudinal distance adjusting rods are pushed close together, the printed board extraction mechanism is in a foldable state.

10. The adjustable distance high holding force variable claw type printed circuit board extraction mechanism according to claim 1, characterized in that: The deformable claw body is formed by bending high-quality carbon structural steel strip, the grip rod is made of aluminum profile, and the rotating shaft is made of non-metallic wear-resistant material.

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