CN114321132A

CN114321132A - Limiting screw, fastening component and circuit board card

Info

Publication number: CN114321132A
Application number: CN202111643801.6A
Authority: CN
Inventors: 成家柏
Original assignee: Hangzhou Guangli Microelectronics Co ltd
Current assignee: Hangzhou Guangli Test Equipment Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-04-12

Abstract

The invention provides a limiting screw which comprises a screw head and a screw rod, wherein the screw head and the screw rod are fixedly connected, the screw rod comprises a first screw rod section and a second screw rod section which are sequentially connected, and the screw head is arranged at one end of the first screw rod section; the limiting piece is arranged on the first screw rod section; the radial dimensions of the screw head and the limiting piece are larger than the radial dimension of the first screw section. The limiting screw has the beneficial effects that the limiting screw can be used for connecting and fixing two assemblies, namely an assembly A and an assembly B, a first screw rod section of the limiting screw penetrates through a screw hole of the assembly A, a limiting piece abuts against one end face of the assembly A, and a second section of screw penetrates through the screw hole of the assembly B and is connected with the assembly B; when the assembly A and the assembly B are to be disassembled, the limiting screw is unscrewed from the assembly B, the assembly A can be lifted away from the assembly B along with the limiting screw under the action of the limiting part when the limiting screw is pulled up, and the disassembling method is suitable for assembling, disassembling and separating between tight assemblies and between assemblies with narrow installation positions.

Description

Limiting screw, fastening component and circuit board card

Technical Field

The invention belongs to the technical field of semiconductor installation, and particularly relates to a limiting screw, a fastening member and a circuit board card.

Background

In the prior art, the Printed Circuit Board (PCB) has a wide application range, such as small electronic computers, mobile phones, and even business machines including fax machines, printers, photocopiers, scanners, and multifunctional business machines integrating the above functions, and medium-sized and large-sized data processing equipment including notebook computers, desktop pcs, servers, etc., the Printed Circuit Board is often visible inside the product, and the Printed Circuit Board has a wide variety of applications and powerful functions. Various electronic parts such as capacitors, transistors, communication chips, micro-processing chips and the like required by the operation of electronic products are assembled and integrated on the printed circuit board, and the printed circuit board has the advantages of accurate assembly and positioning, easy batch production and manufacture, convenient future maintenance, replacement operation and the like.

Generally, circuit traces such as circuits are distributed on a printed circuit board, a configuration area of an electronic component is reserved, a plurality of hole sites are formed at appropriate positions corresponding to the electronic component, pins of the electronic component penetrate out of the printed circuit board, the electronic component is fixed at an assembly position on the printed circuit board in a welding manner, and the electronic component is electrically connected with other electronic components through the circuit traces such as the circuits.

However, in some devices, a plurality of printed circuit boards often need to be tightly mounted, or the mounting positions of the printed circuit boards are narrow, in the prior art, hole sites are usually formed in the printed circuit boards, and the printed circuit boards are fixed to the mounting positions of the devices through screws, so that technicians are difficult to lift the printed circuit boards singly and inconvenient to dismount due to too many or too dense circuit boards after the fixing screws are screwed in assembly and disassembly processes.

Disclosure of Invention

The invention provides a limiting screw which is convenient for assembling, disassembling and separating two tight components or components with narrow installation positions.

The invention provides a fastening member which can be conveniently applied to tight components and components with narrow installation positions.

The invention provides a circuit board card which is convenient to assemble and disassemble and convenient to overhaul at a later stage.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the purposes or other purposes, the limit screw provided by the technical scheme of the invention comprises a screw head and a screw rod which are fixedly connected, wherein the screw rod comprises a first screw rod section and a second screw rod section which are sequentially connected, and the screw head is arranged at one end of the first screw rod section; the screw rod further comprises a limiting piece, and the limiting piece is installed on the first screw rod section; and the radial dimensions of the screw head and the limiting piece are larger than the radial dimension of the first screw section. The technical scheme has the beneficial effects that the limiting screw can be used for connecting and fixing two assemblies, namely an assembly A and an assembly B, a first screw section of the limiting screw penetrates through a screw hole of the assembly A, a limiting piece abuts against one end face of the assembly A, and a second section of screw penetrates through a screw hole of the assembly B and is connected with the assembly B; when the assembly A and the assembly B are to be disassembled, the limiting screw is unscrewed from the assembly B, the assembly A can be lifted away from the assembly B along with the limiting screw under the action of the limiting part when the limiting screw is pulled up, and the disassembling method is suitable for assembling, disassembling and separating between tight assemblies and between assemblies with narrow installation positions.

The locating part includes spacing piece, and spacing piece detachably chucking is in on the first screw rod section. The limiting piece can be an annular piece with a notch, and the limiting piece is sleeved and pulled away from the first screw section at the notch. The technical scheme has the beneficial effects that the limiting sheet is adopted, particularly the annular sheet with the notch is adopted, and the installation and the disassembly are convenient.

The locating part still includes the fixed block, the fixed block detachably installs on the first screw rod section, and support and lean on spacing piece is close to one side of second screw rod section. The technical scheme has the beneficial effects that the fixing block is utilized to further fix the limiting piece, the limiting effect of the limiting piece is guaranteed, and the stability is improved.

And at least part of the second screw section is provided with an external thread.

The fixed block can be an annular fixed block, the inner peripheral surface of the annular fixed block is provided with an internal thread matched with the external thread of the second screw section, and the annular fixed block can be screwed in and out along the external thread of the second screw section.

The fixed block can also be a fixed block with a notch, at least part of the inner peripheral surface of the fixed block is matched with the outer peripheral surface of the first screw section, and the fixed block is sleeved with or pulled away from the first screw section from the notch.

In order to achieve one or a part or all of the purposes or other purposes, the invention also provides a fastening component, which comprises a component body and the limiting screw; the component body is provided with at least one first through hole, the component body is used for fixing a target component, and the limiting screw is installed in the first through hole; the first screw section of the limiting screw is located in the first through hole and can rotate in the first through hole, the screw head and the limiting piece are respectively abutted against two sides of the first through hole so as to limit the first screw section in the first through hole, and the second screw section is exposed out of the first through hole and used for installing and fixing the fastening member on an external structure. The beneficial effects of this technical scheme lie in, including stop screw in this fastening component, can utilize stop screw to carry on spacingly to the component body in the fastening component, when unscrewing stop screw and dismantling the separation, can utilize the locating part to make whole fastening component wholly follow stop screw and lift for fastening component can conveniently be applied to between the inseparable subassembly and between the narrow and small subassembly of mounted position.

The component body is also provided with at least one second through hole, and a screw passes through the second through hole to detachably fix the target component on the component body.

The fastening member further comprises at least one anti-drop screw, and the anti-drop screw comprises an anti-drop screw head and an anti-drop screw rod; the component body is provided with at least one screw hole for installing the anti-drop screw, and at least part of the anti-drop screw penetrates through the screw hole to be connected with an external structure so as to fixedly install the fastening component on the external structure.

The anti-falling screw comprises an upper section screw and a lower section screw, the upper section screw is connected with the anti-falling screw head, the lower section screw is provided with external threads, and the outer diameter of the upper section screw is smaller than that of the lower section screw; an internal thread matched with the external thread is arranged in the screw hole; the anti-drop screw is screwed into the screw hole by utilizing external threads, so that the upper section screw rod penetrates through the screw hole, and the lower section screw rod penetrates through the screw hole and is used for fixedly installing the fastening member on an external structure. When the anti-drop screw is screwed off the external structure, the anti-drop screw can be limited in the screw hole of the fastening component due to the external thread structure of the lower section screw rod, and the anti-drop screw can be prevented from falling and losing to a certain extent.

The component body is also provided with at least one through mounting groove, the mounting groove extends and expands towards one side of the target component to form a groove, and the size of the groove is matched with that of the target component.

In order to achieve one or a part of or all of the above or other objects, the present invention further provides a circuit board, which includes a main board and the fastening member, wherein the main board is a target member, and the main board is fixedly mounted on the fastening member.

The component body of the circuit board card is further provided with at least one through mounting groove, the lower end of the mounting groove extends and expands to form a groove, the size of the groove is matched with the upper end of the mainboard, the mainboard is mounted on the fastening component by means of upper end matching, and the connecting line of the mainboard penetrates through the mounting groove.

Compared with the prior art, the invention has the beneficial effects that: the limiting screw provided by the invention is suitable for mounting and dismounting between tight components and between components with narrow mounting positions, and is convenient and simple to operate; the fastening component and the circuit board card provided by the invention are mounted by adopting the limiting screw, so that the fastening component and the circuit board card can be more conveniently and tightly mounted, can be mounted and dismounted in a narrow space, and are convenient to overhaul and dismount at a later stage.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive efforts.

Fig. 1 is a schematic structural view of a limit screw according to a first embodiment of the present invention.

Fig. 2 is a schematic bottom view of the position limiting member in fig. 1.

Fig. 3 is a schematic top view of a fastening member according to a third embodiment of the present invention.

Fig. 4 is a perspective view of the fastening member of fig. 3.

Fig. 5 is a sectional view of the fastening member in fig. 3.

Fig. 6 is a schematic perspective view of an anti-separation screw according to a third embodiment of the present invention.

Fig. 7 is a schematic front view of a circuit board according to a fourth embodiment of the present invention.

Fig. 8 is a schematic view of an installation structure of the circuit board card in fig. 7.

Reference numerals: 1-fastening member, 2-main board, 3-connecting wire; 11-component body, 12-installation groove, 13-second through hole, 14-screw hole, 15-limit screw, 16-anti-drop screw, 17-first through hole and 18-groove; 151-limiting piece, 152-limiting piece, 153-fixing block, 154-screw head, 155-first screw rod section, 156-second screw rod section; 161-nut, 162-upper screw, 163-lower screw.

Detailed Description

The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of a preferred embodiment, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic structural view of a limit screw according to a first embodiment of the present invention. Referring to fig. 1, the limit screw 15 of the present embodiment includes a screw head 154 and a screw rod fixedly connected to each other. The screw comprises a first screw section 155 and a second screw section 156 which are connected in sequence, a screw head 154 is arranged at one end of the first screw section 155, and an external thread is arranged on the second screw section 156; further comprising a stop 151 mounted on the first screw section 155; wherein the screw head 154 and the retaining member 151 have a radial dimension greater than the radial dimension of the first screw section 155.

Fig. 2 is a bottom view of the position limiting member in the present embodiment. Referring to fig. 1 and fig. 2, in the embodiment, the limiting member 151 includes a limiting piece 152 and a fixing block 153. The limiting piece 152 can be an annular piece with a notch, and the limiting piece 152 is sleeved with or pulled away from the first screw section 155 from the notch, so that the installation and the disassembly of the limiting piece 152 are realized; the limiting block 153 is an annular fixing block, and an inner circumferential surface of the annular fixing block is provided with an inner thread matched with the outer thread on the second screw section 156, so that the annular fixing block can be screwed in and out along the outer thread on the second screw section 156. After screwing in, the fixing block 153 is located on the first screw section 155 and abuts against one side of the limiting piece 153 close to the second screw section 156.

The second embodiment of the invention provides another limit screw, which is different from the first embodiment in that the structure of the limit block of the limit screw is different from that of the first embodiment, the limit block of the first embodiment can be a fixed block with a notch, the inner circumferential surface of the fixed block is at least partially matched with the outer circumferential surface of the first screw section 155, the fixed block can be sleeved with or pulled away from the first screw section 155 from the notch, and the fixed block can be made of a flexible material, such as rubber, so that the installation and the disassembly are convenient.

Fig. 3 to 5 show a fastening member 1 according to a third embodiment of the present invention. Referring to fig. 1 to 5, the fastening member 1 includes a member body 11, the member body 11 is provided with at least one through mounting groove 12 for mounting a target member, and at least one first through hole 17 for mounting a limit screw 15. When the screw is installed, the first screw section 155 of the limit screw 15 is positioned in the first through hole 17 and can movably rotate in the first through hole 17, and the screw head 154 and the limiting piece 151 of the limit screw 15 respectively abut against the end surfaces at two sides of the first through hole 17, so that the first screw section 155 is limited in the first through hole 17; the second shank section 156 of the limit screw 15 is exposed outside the first through hole 17 for mounting the fastening member 1 on an external structure.

In addition, the member body 11 of the fastening member 1 of the embodiment further has at least one second through hole 13, the second through hole 13 is used for installing a screw, the screw may be a common screw in the market, and the screw passes through the second through hole 13 and then detachably installs and fixes the target member on the member body 11. At least one screw hole 14 is further formed on the member body 11, and a corresponding number of anti-drop screws 16 are correspondingly configured on the screw hole 14, which can be referred to in fig. 6. The anti-falling screw 16 comprises an anti-falling screw head 161 and an anti-falling screw rod, the anti-falling screw rod comprises an upper section screw rod 162 and a lower section screw rod 163, the upper section screw rod 162 is connected with the anti-falling screw head 161, an external thread is arranged on the lower section screw rod 163, and the outer diameter of the upper section screw rod 162 is smaller than that of the lower section screw rod 163. The screw hole 14 is provided with an internal thread matching the external thread, and the retaining screw 16 is screwed into the screw hole 14 by the external thread at the bottom, so that the upper screw 162 passes through the screw hole 14, and the lower screw 163 extends out of the screw hole 14, thereby fixing and mounting the member body 11 to an external structure.

To further better match the member body 11 of the fastening member 1 with the target member, the mounting groove 12 extends toward the target member mounting position side with a recess 18 for accommodating the target member, the recess 18 being sized to match the target member.

In other embodiments, the member body is not provided with the mounting groove or the groove, and the target member can be fixed on the member body only by using a screw; of course, in other embodiments, the shape and structure of the member body may be modified for different target members, so as to more conveniently fix the target members on the member body.

The fourth embodiment of the invention provides a circuit board card. Referring to fig. 7, the circuit board includes the fastening member 1 in the third embodiment, the main board 2 is a target member, the main board 2 is installed on one side of the fastening member 1 through the screws in the second through holes 13, one end portion of the main board 2 is accommodated in the groove 18, and the connecting wire 3 on the main board 2 is exposed through the installation groove 12 on the fastening member 1.

Fig. 8 is a schematic structural diagram of a plurality of circuit boards clamped in a close arrangement. With reference to fig. 1 to 8, the mounting and dismounting operations will be described with reference to the limit screw in the first embodiment, the fastening member 1 in the third embodiment, and the circuit board in the fourth embodiment. When the main board 2 is installed, one end part of the main board 2 is used as a target component and is accommodated in the groove 18 on the component body 11 of the fastening component 1, the connecting line 3 of the main board 2 is exposed after extending into the installation groove 12 through the groove 18, and then a screw is passed through the second through hole 13 on the component body 11 to fasten the fastening component 1 and the main board 2 together. After the fastening member 1 and the motherboard 2 are mounted together, the fastening member 1 and the motherboard 2 are mounted together on an external member such as an electrical testing device for an integrated circuit, and the mounting steps of the part are that the limit screw 15 is screwed into the first through hole 17 of the member body 11 by using the thread on the second screw section 156, and the first screw section 155 is located in the first through hole 17, the second screw section 156 is exposed out of the first through hole 17, the screw head 154 is clamped on one side of the first through hole 17, then the limiting sheet 152 and the limiting block 153 are mounted and clamped on the other side of the first through hole 17, and the exposed second screw section 156 is used for realizing mounting connection with the external member. In order to further realize the installation and fastening with the external member, a screw hole 14 formed in the member body 11 can be provided with a retaining screw, and the member body 11 and the external member are further fastened by the retaining screw. When the disassembly method is needed, the limit screw 15 is unscrewed from the external component, when the limit screw 15 is pulled up, the fastening component 11 and the main board 2 fixedly connected with the fastening component 11 can be lifted up along with the limit screw 15 by using the action of the limiting part, so that the main board is separated from the external component, and the disassembly method is very suitable for the assembly and disassembly separation work between tight components and between components with narrow installation positions.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, which is defined by the claims and the description of the invention, and all simple equivalent changes and modifications made therein are also within the scope of the invention. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Claims

1. A limit screw comprises a screw head and a screw rod which are fixedly connected, and is characterized in that the screw rod comprises a first screw rod section and a second screw rod section which are sequentially connected, and the screw head is arranged at one end of the first screw rod section; the screw rod further comprises a limiting piece, and the limiting piece is installed on the first screw rod section; and the radial dimensions of the screw head and the limiting piece are larger than the radial dimension of the first screw section.

2. The limit screw according to claim 1, wherein the limit piece comprises a limit piece detachably clamped on the first screw section.

3. The limit screw according to claim 2, wherein the limit piece is a ring-shaped piece with a notch, and the limit piece is sleeved on and pulled away from the first screw section from the notch.

4. The limit screw according to claim 2 or 3, wherein the limit piece further comprises a fixing block, and the fixing block is detachably mounted on the first screw section and abuts against one side of the limit piece close to the second screw section.

5. The limit screw of claim 4, wherein the second shank segment is at least partially externally threaded.

6. The limit screw according to claim 5, wherein the fixing block is an annular fixing block, an inner thread matched with the outer thread of the second screw section is arranged on the inner circumferential surface of the annular fixing block, and the annular fixing block can be screwed in and out along the outer thread of the second screw section.

7. The limit screw according to claim 4, wherein the fixing block is a fixing block with a notch, the inner peripheral surface of the fixing block is at least partially matched with the outer peripheral surface of the first screw section, and the fixing block is sleeved on and pulled away from the first screw section from the notch.

8. A fastening member comprising a member body and at least one limit screw as claimed in any one of claims 1 to 7;

wherein, the component body is provided with at least one first through hole; the member body is used for fixing a target member; the limiting screw is arranged in the first through hole;

the first screw section of the limiting screw is located in the first through hole and can rotate in the first through hole, the screw head and the limiting piece are respectively abutted against two sides of the first through hole so as to limit the first screw section in the first through hole, and the second screw section is exposed out of the first through hole and used for installing and fixing the fastening member on an external structure.

9. The fastening member according to claim 8, wherein the member body further has at least one second through hole, and a screw is inserted through the second through hole to detachably fix the target member to the member body.

10. The fastening member according to claim 8 or 9, further comprising at least one anti-drop screw comprising an anti-drop screw head and an anti-drop screw;

the component body is provided with at least one screw hole for installing the anti-drop screw, and at least part of the anti-drop screw penetrates through the screw hole to be connected with an external structure so as to fixedly install the fastening component on the external structure.

11. The fastening member according to claim 10, wherein the anti-slip screw comprises an upper section screw and a lower section screw, the upper section screw is connected with the anti-slip screw head, the lower section screw is provided with an external thread, and the outer diameter of the upper section screw is smaller than that of the lower section screw; an internal thread matched with the external thread is arranged in the screw hole; the anti-drop screw is screwed into the screw hole by utilizing external threads, so that the upper section screw rod penetrates through the screw hole, and the lower section screw rod penetrates through the screw hole and is used for fixedly installing the fastening member on an external structure.

12. The fastening member according to claim 8 or 9, wherein the member body further has at least one through mounting groove extending toward the target member and having a groove extending therefrom, the groove being sized to fit the target member.

13. A circuit card comprising a main board and a fastening member as claimed in any one of claims 8 to 12, the main board being a target member, the main board being fixedly mounted on the fastening member.

14. The circuit board of claim 13, wherein the component body further has at least one through mounting groove, the lower end of the mounting groove extends and expands with a groove, the size of the groove matches with the upper end of the main board, the main board is mounted on the fastening component by upper end matching, and the connecting line of the main board passes through the mounting groove.