TWM639946U - PCB assembling structure - Google Patents

Abstract

This creation relates to a circuit board assembly structure, the circuit board assembly structure includes a shell, a circuit board, a terminal block, an insulating piece and a metal screw, the shell has a metal heat dissipation plate, and the metal heat dissipation plate is provided with a first through hole; the circuit board Thermally connected to one side of the metal heat sink, the circuit board has electrical contacts and a second through hole; the terminal base is installed on the circuit board, the terminal base has a conductive part electrically connected to the electrical contacts and is provided with a lock hole; insulation There is a casing extending from the piece, and the casing is passed through the first through hole; the metal screw has a screw rod that passes through the casing and the second through hole and is screwed into the lock hole; wherein, the size of the inner peripheral wall of the second through hole is larger than that of the sleeve The size of the inner peripheral wall of the tube is such that a distance is formed between the screw rod and the inner peripheral wall of the second through hole.

Description

Circuit Board Assembly Structure

The invention relates to an assembly structure assembled with a circuit board, a terminal base and a casing, and in particular relates to a circuit board assembly structure.

Printed Circuit Board Assembly (PCBA) is a PCB bare board that first passes through SMT (Surface Mount Technology) and then DIP (Dual In-Line Package) plug-ins. The PCB bare board and various ICs, capacitors, Finished products assembled from electronic components such as resistors and connectors.

Among them, the PCB bare board is made of high thermal conductivity metal materials such as aluminum substrates, and the PCB bare board is thermally bonded to the housing made of aluminum and other high thermal conductivity metal materials to help various ICs, capacitors, and resistors The role of heat dissipation; at the same time, in order to avoid electrical conduction between the terminal block on the assembled PCB bare board and the bare PCB, the terminal block will be assembled with plastic screws.

However, the structural strength and toughness of the above-mentioned plastic screws is lower than that of metal screws. As a result, in the assembly process of the terminal block, if the locking force is improperly applied or the force of the screws is uneven, the plastic screws are prone to breakage. Or damaged, more seriously, the plastic screw is stuck in the screw hole, causing the assembly personnel to feel inconvenient to work.

In view of this, the author of the present invention, aiming at the above-mentioned prior art, devoted himself to the research and cooperated with the application of theories, and tried his best to solve the above-mentioned problems, which became the goal of the author's improvement.

This creation provides a circuit board assembly structure, which uses the size of the inner peripheral wall of the second through hole to be larger than the inner peripheral wall of the sleeve, so that a distance is formed between the screw rod and the inner peripheral wall of the second through hole, thereby avoiding the metal screw and the inner peripheral wall of the sleeve. The circuit boards are electrically connected so that the circuit board assembly structure has excellent insulation capability. .

In the embodiment of the invention, the invention provides a circuit board assembly structure, including: a housing with a metal heat dissipation plate, the metal heat dissipation plate is provided with at least one first through hole; a circuit board, thermally connected to the One side of the metal heat dissipation plate, the circuit board has an electrical contact and at least one second through hole; a terminal base is installed on the circuit board, and the terminal base has a conductive part electrically connected to the electrical contact And at least one lock hole is provided; at least one insulator is extended with at least a sleeve, and the sleeve is passed through the first through hole; and at least one metal screw is provided with the sleeve and the second through hole. hole and screwed to a screw in the locking hole; wherein, the size of the inner peripheral wall of the second through hole is larger than the size of the inner peripheral wall of the sleeve, so that a distance is formed between the screw rod and the inner peripheral wall of the second through hole .

Based on the above, compared with the conventional use of plastic screws to assemble the terminal block, this creation uses metal screws to assemble the terminal block. Because the structural strength and toughness of metal screws is higher than that of plastic screws, it can effectively reduce the occurrence of screw breakage during the assembly process. The possibility of being damaged or stuck in the screw holes will increase the assembly yield and structural strength of the circuit board assembly structure.

The detailed description and technical content of this creation will be described as follows with the drawings, but the attached drawings are only for illustration purposes and are not used to limit this creation.

Please refer to Figures 1 to 7, the invention provides a circuit board assembly structure, the circuit board assembly structure 10 mainly includes a housing 1, a circuit board 2, a terminal block 3, one or a plurality of insulating parts 4 and One or plural metal screws 5 .

As shown in Figures 1 to 7, the housing 1 is made of high thermal conductivity metal materials such as aluminum and copper. The housing 1 has a metal heat sink 11, and the metal heat sink 11 is provided with one or a plurality of first through holes 12, and A plurality of heat dissipation fins 111 extend from the side of the heat dissipation plate 11 away from the circuit board 2 and define a slot 112 .

As shown in Figures 1 to 2 and Figures 5 to 7, the circuit board 2 is thermally connected to one side of the metal heat sink 11, and the circuit board 2 has an electrical contact (not shown in the figure) and is provided with one or a plurality of second channels. Hole 22.

As shown in Figures 1 to 2 and Figures 5 to 7, the terminal base 3 is made of conductive materials such as metal. The terminal base 3 is a terminal terminal such as a battery terminal base or a radio frequency coaxial terminal base. The terminal base 3 is installed On the circuit board 2 , the terminal base 3 has a conductive portion 31 electrically connected to an electrical contact and is provided with one or a plurality of locking holes 32 , and the conductive portion 31 is formed between the two locking holes 32 .

As shown in Figures 1 to 2 and Figures 4 to 7, the insulator 4 is made of insulating materials such as plastic, and the insulator 4 extends with one or a plurality of bushings 41, and the bushings 41 are installed in the first through hole 12 to insulate The component 4 has a base 42 that is stopped and positioned on the other side of the metal heat sink 11. The base 42 is extended with a clamping block 421 engaged in the clamping groove 112, so that the insulating component 4 is firmly clamped to the housing. 1.

The details are as follows. In this embodiment, more than two sleeves 41 are formed by extending from a single substrate 42 at intervals, but this is not a limitation. Each sleeve 41 can also be extended and formed from each base 42 (not shown in the figure). ), that is, a single sleeve 41 is formed by extending from a single base 42 .

As shown in Figures 1 to 2 and Figures 4 to 7, the metal screw 5 has a screw rod 51 and a head 52, the screw rod 51 passes through the sleeve 41 and the second through hole 22 and is screwed into the lock hole 32, The head 52 is stopped and limited by the base body 42 .

As shown in Figures 1 to 2 and Figures 5 to 7, the inventive circuit board assembly structure 10 further includes a sub-circuit board 7, the circuit board 2 is a mother circuit board, and the sub-circuit board 7 is overlapped on the top of the circuit board 2, The circuit board 2 , the sub-circuit board 7 , the terminal block 3 and various electronic components such as ICs, capacitors, resistors, and connectors are assembled into a printed circuit board assembly (PCBA).

In addition, the sub-circuit board 7 of this embodiment is provided with two third through holes 71, the sub-circuit board 7 abuts against the bottom of the terminal block 3 and is electrically connected with the terminal block 3, and each metal screw 5 is passed through each third through hole 71 .

Among them, in order to help components such as ICs, capacitors, and resistors dissipate heat, the circuit board 2 will be made of high thermal conductivity metal materials such as aluminum substrates. It will be made of insulating materials such as plastic substrates.

As shown in Figures 1 to 2 and Figures 5 to 7, the inventive circuit board assembly structure 10 further includes a spacer 8, the spacer 8 is made of insulating materials such as plastic, and the spacer 8 is sandwiched between the circuit board 2 and the The terminal bases 3 are arranged outside the conductive portion 31 to prevent the terminal bases 3 and the circuit board 2 from abutting against each other and electrically conducting.

Furthermore, when the screw rod 51 is set in the casing 41, the size of the inner wall of the third through hole 71 is larger than the size of the inner wall of the sleeve 41 because the size of the inner wall of the second through hole 22 is larger than the size of the inner wall of the sleeve 41. , so that a distance is formed between the screw rod 51 and the inner peripheral wall of the second through hole 22, and a distance is formed between the screw rod 51 and the inner peripheral wall of the third through hole 71, so that the screw rod 51 cannot be in contact with the inner peripheral wall of the second through hole 22. Or the inner peripheral wall of the third through hole 71 is in contact, thereby avoiding the situation that the metal screw 5 is electrically connected to the circuit board 2 or the sub-circuit board 7 .

Also, as shown in FIG. 5, the end of the sleeve 41 can be extended to pass through the second through hole 22 or the third through hole 71 (not shown in the figure), so that the sleeve 41 is arranged between the screw rod 51 and the second through hole. Between the inner peripheral wall of 22 or the inner peripheral wall of the third through hole 71, the situation of electrical connection between the metal screw 5 and the circuit board 2 or the sub-circuit board 7 can be prevented.

In addition, the number of the terminal base 3 and the base body 42 in this embodiment is plural, but it is not limited thereto, and the number of the terminal base 3 and the base body 42 can be one.

Moreover, the number of the first through hole 12, the second through hole 22, the lock hole 32, the casing 41, the metal screw 5 and the third through hole 71 in this embodiment is two or more than two, but not As a limitation, the number of the first through hole 12 , the second through hole 22 , the locking hole 32 , the bushing 41 , the metal screw 5 and the third through hole 71 may also be one.

As shown in Figures 5 to 6, the use state of the inventive circuit board assembly structure 10 is that the sleeve 41 of the insulating member 4 is used to penetrate the first through hole 12 of the housing 1, and the screw rod 51 of the metal screw 5 is then used. Through the casing 41 and screwed to the lock hole 32, because the size of the inner peripheral wall of the second through hole 22 of the circuit board 2 is larger than the size of the inner peripheral wall of the sleeve 41, so that the screw rod 51 and the inner peripheral wall of the second through hole 22 There is a distance between them, so that the screw 51 cannot contact the inner peripheral wall of the second through hole 22 , thereby avoiding the electrical connection between the metal screw 5 and the circuit board 2 , so that the circuit board assembly structure 10 has excellent insulation capability.

In addition, compared with the conventional use of plastic screws to assemble the terminal block, this creation uses metal screws 5 to assemble the terminal block 3, because the structural strength and toughness of the metal screw 5 is higher than that of the plastic screw, so as to effectively reduce the occurrence of screws during the assembly process. The possibility of breaking, breaking or being stuck in the screw holes increases the assembly yield and structural strength of the circuit board assembly structure 10 .

To sum up, the circuit board assembly structure of this creation can indeed achieve the expected purpose of use, and solve the lack of conventional knowledge, and has industrial applicability, novelty and progress, and fully meets the requirements for patent application. It is filed in accordance with the Patent Law. Application, please check and approve the patent in this case to protect the rights of creators.

10: Circuit board assembly structure 1: Shell 11: Metal cooling plate 111: cooling fins 112: card groove 12: The first through hole 2: circuit board 22: Second through hole 3: Terminal block 31: Conductive part 32: Keyhole 4: Insulation 41: Casing 42: matrix 421: block 5: metal screw 51: screw 52: head 7:Sub circuit board 71: The third through hole 8: Isolation piece

Figure 1 is a three-dimensional exploded view of the circuit board assembly structure of this invention.

Fig. 2 is another three-dimensional exploded view of the circuit board assembly structure of this invention.

Figure 3 is a three-dimensional combination diagram of the circuit board assembly structure of this invention.

Fig. 4 is another three-dimensional combination diagram of the circuit board assembly structure of this invention.

Figure 5 is a schematic cross-sectional view of the circuit board assembly structure of this invention.

Fig. 6 is another schematic cross-sectional view of the circuit board assembly structure of the present invention.

Fig. 7 is another schematic cross-sectional view of the circuit board assembly structure of the present invention.

10: Circuit board assembly structure

1: shell

11: Metal cooling plate

4: Insulation

42: matrix

5: metal screw

52: head

Claims (11)

A circuit board assembly structure, comprising: A housing with a metal heat dissipation plate, the metal heat dissipation plate is provided with at least one first through hole; A circuit board, thermally connected to one side of the metal heat sink, the circuit board has an electrical contact and is provided with at least one second through hole; A terminal base installed on the circuit board, the terminal base has a conductive part electrically connected to the electrical contact and is provided with at least one locking hole; At least one insulating member extends with at least a sleeve, and the sleeve is passed through the first through hole; and at least one metal screw, having a screw threaded through the sleeve and the second through hole and screwed into the locking hole; Wherein, the size of the inner peripheral wall of the second through hole is larger than the size of the inner peripheral wall of the sleeve, so that a distance is formed between the screw rod and the inner peripheral wall of the second through hole. The circuit board assembly structure as described in Claim 1, wherein the number of the first through hole, the second through hole, the lock hole, the bushing and the metal screw is two respectively, and the conductive part is formed between the two lock holes. The circuit board assembly structure as described in claim 2, wherein the number of insulators is one, and the insulator has a base body that is stopped and limited on the other side of the metal heat dissipation plate, and the two sleeves are formed from the base body Spacer extension molding. The circuit board assembly structure as described in claim 2, wherein the number of insulators is two, and each insulator has a base body that is stopped and limited on the other side of the metal heat dissipation plate, and each of the sleeves is respectively connected to the Extended molding on the substrate. The circuit board assembly structure as described in claim 3 or 4, wherein the side of the metal heat dissipation plate away from the circuit board is extended with a plurality of heat dissipation fins and a slot, and the base body is extended with a slot that is engaged with the slot piece. The circuit board assembly structure as claimed in claim 3 or 4, wherein each of the metal screws has a head limited by the stopper of the base body. As the circuit board assembly structure described in claim 2, it further includes a sub-circuit board, the sub-circuit board is overlapped on the top of the circuit board, the sub-circuit board is provided with two third through holes, and the sub-circuit board abuts against Under the terminal base and electrically connected with the terminal base, each of the metal screws passes through each of the third through holes. The circuit board assembly structure according to claim 7, wherein the size of the inner peripheral wall of the third through hole is larger than the size of the inner peripheral wall of the sleeve, so that a distance is formed between the screw and the inner peripheral wall of the third through hole. The circuit board assembly structure according to claim 1 further includes an isolator, which is interposed between the circuit board and the terminal block and disposed outside the conductive portion. The circuit board assembly structure according to claim 1, wherein the sleeve is passed through the second through hole. The circuit board assembly structure as described in Claim 1, wherein the terminal base is a battery terminal female base or a radio frequency coaxial terminal female base.

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