Printed board welding-free connector

Abstract

A welding-free connector for a printed circuit board comprises a connector shell and the printed circuit board, a contact disc of the printed circuit board is in contact with a terminal of the connector, the tail end of the printed circuit board is fixed by a circuit board fixing frame, and a clamping groove capable of clamping the tail end of the printed circuit board is arranged on the circuit board fixing frame. According to the utility model, the printed circuit board and the terminals of the connector do not need to be connected through welding any more, so that the assembly efficiency and the product qualification rate are improved, and the product assembly cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of connectors, and in particular relates to a printed circuit board solder-free connector. Background Art

[0002] Among medical ultrasound diagnostic equipment, there are cart-type ultrasound diagnostic equipment and portable ultrasound diagnostic equipment. Portable ultrasound diagnostic equipment is often used for outdoor diagnosis and mobile diagnosis. It is widely used due to its greater mobility. Portable ultrasound diagnostic equipment is small in size, similar to a laptop computer, very thin in thickness and small in width. Commonly used ultrasound probes include phased array probes, convex array probes and linear array probes. Therefore, three probe connector interfaces must be set on one side of the width direction of the ultrasound diagnostic equipment. This requires that the connector used to connect to the ultrasound probe must first be flat, secondly, be arranged in parallel in the width direction of the connectors, and have space for finger operation. Thirdly, the host end is thin in thickness, and there is no space for finger operation in the thickness direction of the connector.

[0003] While meeting the above three characteristics, the ultrasonic connector is also required to have the characteristics of multi-core transmission. A certain number of contact terminals must be met to achieve good imaging quality. Existing connectors are usually double-row terminals with very small contact spacing, and the plug-in form is a hard friction gold finger connection form, that is, one end of the connector is rigid and the other end is elastic. When the connector is plugged in or out, the elastic contact piece first contacts with the rigid contact piece, and then rubs along the plug-in direction to achieve consistency with the plug-in and pull-out of the connector. This structural form has the following problems: the printed circuit board at the plug end and the terminal are combined by welding, the processing cost is high, the product qualification rate is low, and during portable use, the welding part between the printed circuit board and the terminal becomes loose due to bumps, shaking, vibrations, etc. of the equipment, which affects the normal use of the connector. Utility Model Content

[0004] The purpose of the utility model is to provide a printed circuit board solder-free connector, which improves the assembly structure of the printed circuit board in the connector so that the printed circuit board and the terminals of the connector no longer need to be connected by welding, so as to improve the assembly efficiency and product qualification rate and reduce the product assembly cost.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a printed circuit board solderless connector, including a connector housing and a printed circuit board, the contact plate of the printed circuit board contacts the terminal of the connector, the tail end of the printed circuit board is fixed by a circuit board fixing frame, and the circuit board fixing frame is provided with a card slot capable of clamping the tail end of the printed circuit board.

[0006] The beneficial effect is that the printed circuit board is fixed by the circuit board fixing frame, which is located at the rear end of the printed circuit board. In addition to fixing the printed circuit board, the circuit board fixing frame can also have a retreat-stopping effect to prevent the printed circuit board from retreating during the plugging process of the connector, thereby ensuring reliable contact between the contact plate of the printed circuit board and the terminal of the connector. The printed circuit board and the terminal in the connector no longer need to be connected by welding, so as to improve assembly efficiency and product qualification rate and reduce product assembly cost.

[0007] The contact pads of the printed circuit board are distributed on two sides of the circuit board, and the contact pads on the two sides correspond to each other one by one.

[0008] The beneficial effect is that the contact plate and the terminal are easily contacted one to one.

[0009] The terminal is a signal pin component, the signal pins of the signal pin component correspond to the contact disk one by one, and the tail end of the signal pin is provided with a protruding contact portion that can elastically contact the contact disk.

[0010] The beneficial effect is that the raised contact portion of the signal pin component contacts the corresponding contact plate by utilizing its own elasticity, which can ensure the reliability of the contact process and generate a plug-in and pull-out feel during the process of installing the printed circuit board.

[0011] The signal pins of the signal pin component are arranged in a row at intervals and fixed on an insert insulator, and the insert insulator is fixed in the connector housing.

[0012] The beneficial effects are: avoiding the situation that the signal pin retreats during the plugging and unplugging process of the connector, and the insert insulator is detachable from the connector housing, which is convenient for the later maintenance of the connector and the replacement of the signal pin component.

[0013] Two signal pin components are provided, and the insert insulators of the two signal pin components are assembled together through a convex-concave matching structure so that the signal pins on the two signal pin components correspond to each other one by one; the spacing between the relative signal pins on the two signal pin components in a natural state is smaller than the spacing between the corresponding contact pads on the printed circuit board.

[0014] Its beneficial effects are: the two insert insulators are connected by a convex-concave matching structure, which can avoid relative displacement between the two insert insulators and ensure that the signal pins of the two signal pin components can correspond one to one; when installing the printed circuit board, it needs to be inserted between the relative signal pins so that the signal pins are in elastic contact with the corresponding contact pads, and the spacing between the relative signal pins in the natural state is smaller than the spacing between the corresponding contact pads on the printed circuit board, so that the printed circuit board can push open the signal pin when inserted, and after being inserted into place, the raised contact part of the signal pin is pressed against the contact pad due to deformation, thereby ensuring reliable contact.

[0015] The signal pin component is provided with two rows of signal pins, which are fixed on the same insert insulator, and the two rows of signal pins correspond to each other one by one. The insert insulator is fixed in the connector housing; the spacing between the two rows of signal pins in a natural state is smaller than the spacing between the contact pads on both sides of the printed circuit board.

[0016] Its beneficial effects are: another structural form of the signal pin component integrates two rows of signal pins on an insert insulator, which can simplify the assembly steps; when installing the printed circuit board, it needs to be inserted between the two rows of signal pins so that the signal pins are in elastic contact with the corresponding contact pads, and the spacing between the two rows of signal pins in a natural state is smaller than the spacing between the corresponding contact pads on the printed circuit board, so that the printed circuit board can push open the signal pins when inserted, and after being inserted into place, the raised contact portion of the signal pin is pressed against the contact pad due to deformation, thereby ensuring reliable contact.

[0017] A strong mounting structure is arranged between the insert insulator and the connector housing.

[0018] The beneficial effect is that the insert insulator is fixed by utilizing the strong mounting structure, and at the same time, the structure is detachable, so that the signal needle component is easy to repair or replace.

[0019] The strong mounting structure is a convex rib arranged on the insert insulator or the connector housing.

[0020] The beneficial effect is that the insert insulator is forcibly installed into the connector housing through the interference fit between the convex rib and the side wall of the connector housing, and the convex rib setting position required for the forcible installation is selected according to the actual situation.

[0021] A signal pin mounting hole for mounting the signal pin component is arranged in the connector housing, a guide block is arranged on each side of the signal pin mounting hole, and the distance between the inner surfaces of the two guide blocks is adapted to the width of the front end of the printed circuit board.

[0022] The beneficial effect is that when the printed circuit board is assembled, the guide block limits the printed circuit board to ensure the centering of the printed circuit board, thereby achieving one-to-one contact between the contact disk on the printed circuit board and the signal pin of the signal pin component.

[0023] An insulating pressure plate is also provided in the connector housing, and a receiving cavity is provided on the insulating pressure plate for receiving the tail end of the signal pin and providing a deformation space for the raised contact portion of the signal pin. The number of the receiving cavities is consistent with the number of a row of signal pins and corresponds one to one. The insulating pressure plate is provided with a slot for inserting the printed circuit board.

[0024] The beneficial effect is that the insulating pressure plate provides protection and support for the tail end of the signal pin, and when the printed circuit board is inserted between two rows of signal pins, the raised contact parts of the two rows of signal pins can only deform and move backward in the accommodating cavity to avoid contact between the signal pins.

[0025] A guide key is arranged on a side of the insulating pressing plate opposite to the slot, and the guide key has a guide slope for guiding the signal needle to enter the corresponding accommodation cavity.

[0026] The beneficial effect is that the guide key can divide the accommodating cavity into two rows, respectively accommodating two rows of signal pins, and the guide slope of the guide key can guide the two rows of signal pins to enter the corresponding accommodating cavity respectively.

[0027] The length of the insulating pressure plate is adapted to the spacing between the inner surfaces of the two guide blocks on the connector housing. Positioning grooves are respectively provided at both ends of the length direction of the insulating pressure plate. A fixing groove cooperating with the positioning groove is provided on the guide block. The positioning groove and the fixing groove are connected by a fixing pin to fix the insulating pressure plate in the connector housing.

[0028] Its beneficial effects are: when installing the insulating pressure plate, the two guide blocks can limit the insulating pressure plate to ensure that the accommodating cavity of the insulating pressure plate corresponds to the signal pin; the fixing between the positioning groove and the fixing groove can be achieved by the fixing pin, and the fixing is detachable, which is convenient for the later maintenance of the connector and the replacement of related components.

[0029] The beneficial effects of the utility model are as follows: the printed circuit board of the utility model adopts a solder-free assembly method, which solves the problem of poor signal transmission caused by cold soldering and bridging soldering between the printed circuit board and the connector, improves the product qualification rate, and reduces the product assembly cost. The structural design of the connector housing leaves limited assembly space for the printed circuit board, and the printed circuit board is fixed and connected with the signal pin to achieve the installation of the printed circuit board on an ultra-thin zero-plug connector such as an ultrasound probe connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the assembly of the printed circuit board and the connector housing in the utility model;

[0031] Figure 2 for Figure 1 A cross-sectional view of

[0032] Figure 3 It is a structural schematic diagram of the connector housing in the utility model;

[0033] Figure 4 It is a structural schematic diagram of a printed circuit board in the utility model;

[0034] Figure 5 It is a structural schematic diagram of the signal needle component in the utility model;

[0035] Figure 6 It is a structural schematic diagram of the insulating pressing plate in the utility model;

[0036] Figure 7 It is a schematic diagram of assembling the insulating pressing plate on the connector housing in the utility model.

[0037] Markings in the figure: 1. Connector housing, 101. Guide block, 102. Signal pin mounting hole, 103. Fixing slot, 2. Printed circuit board, 201. Contact plate, 3. Circuit board fixing frame, 4. Fixing stud, 5. Signal pin component, 501. Raised contact portion, 502. Signal pin, 503. Insert insulator, 504. Raised rib, 505. Groove, 6. Cavity, 7. Insulating pressure plate, 701. Accommodating chamber, 702. Guide key, 703. Positioning slot, 704. Guide ramp, 8. Screw, 9. Fixing pin. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention in any way.

[0039] See attached Figure 1 , 2 As shown, a solder-free connector for printed circuit boards includes a connector housing 1 and a printed circuit board 2. A cavity 6 for mounting the printed circuit board 2 is reserved in the connector housing 1. The printed circuit board 2 is loaded into the connector housing 1 from the back to the front. The contact plate at the front end of the printed circuit board 2 contacts the signal pin of the connector. The rear end of the printed circuit board 2 is fixed by a circuit board fixing frame 3. The circuit board fixing frame 3 is provided with a card slot capable of clamping the rear end of the printed circuit board 2. The circuit board fixing frame 3 is fixed to the connector housing 1 by screws 8. The connector housing 1 is provided with fixing studs 4 or fixing holes that cooperate with the screws 8.

[0040] The front end of the connector housing 1 is a plug-in end, and the rear end is a wire outlet end. The middle part of the connector housing 1 is tilted in the width direction to facilitate manual plugging and unplugging operations. Therefore, the shape of the cavity 6 in the connector housing 1 is approximately triangular. Figure 3 shown.

[0041] In order to facilitate assembly, the shape of the printed circuit board 2 is similar to the shape of the cavity 6, that is, a board body with a wide front end and a narrow rear end. Figure 4 Contact pads 201 are provided on both sides of the front end of the printed circuit board 2, and the contact pads 201 on each side are arranged along the width direction of the printed circuit board 2. The contact pads 201 contact the signal pins one by one, and the contact pads 201 on both sides of the printed circuit board 2 correspond one by one.

[0042] like Figure 2As shown, the plug-in end of the connector housing 1 is embedded with a signal pin component 5, and the signal pin component 5 includes two oppositely arranged ones. Each signal pin component 5 includes a row of densely distributed and spaced signal pins, and the signal pins on the two signal pin components 5 are opposite to each other and are used to contact the contact pads on the two sides of the printed circuit board 2. Figure 5 A schematic diagram of the structure of a signal pin component 5 is given. The densely arranged signal pins 502 are fixed on an insert insulator 503. The front end of the signal pin 502 is used to contact the contact piece on the adapter connector. The rear end of the signal pin 502 is provided with a raised contact portion 501 for contacting the contact plate 201 of the printed circuit board 2. The insert insulator 503 is provided with a convex rib 504, which is used to achieve interference with the side wall of the connector housing 1, so as to achieve the effect of strong insertion into the connector housing 1. The two signal pin components are assembled by a convex-concave matching structure, such as Figure 5 As shown, a groove 505 is provided on the insert insulator 503, and a protrusion is provided on the insert insulator of the corresponding other signal pin component. During assembly, the two signal pin components are assembled by the convex-concave cooperation of the protrusion and the groove, and then the assembled two signal pin components are forced into the connector housing.

[0043] Optionally, the insert insulators in the two signal pin components are an integrated structure, that is, one signal pin component is assembled in the connector housing, and the one signal pin component has two rows of signal pins that are opposite and correspond to each other.

[0044] Optionally, the convex rib may also be arranged on the inner wall of the connector housing, so as to realize the strong fixing of the insert insulator and the connector housing.

[0045] When the printed circuit board 2 is not installed in place, the spacing between the raised contact portions 501 on the relatively arranged signal pins 502 is smaller than the spacing between the contact pads 201 on the two sides of the printed circuit board 2, so that during the assembly process of the printed circuit board 2, the contact pads 201 can push open the raised contact portions 501 of the signal pins 502 and reliably contact the raised contact portions 501 with the help of the elasticity of the signal pins 502.

[0046] like Figure 3 As shown, the front end of the connector housing 1 is provided with a signal pin mounting hole 102, and the signal pin component 5 is installed in the signal pin mounting hole 102. A guide block 101 is provided on each side of the signal pin mounting hole 102, and the distance between the inner surfaces of the two guide blocks 101 is adapted to the width of the front end of the printed circuit board 2, which is used to limit the printed circuit board 2, so as to ensure the centering of the printed circuit board 2, thereby achieving a one-to-one contact between the contact plate 201 on the printed circuit board 2 and the signal pin 502 of the signal pin component 5.

[0047] Preferably, Figure 2As shown, the connector housing 1 is further provided with an insulating pressing plate 7, and the structure of the insulating pressing plate 7 is as follows: Figure 6 As shown, the insulating platen 7 is provided with a receiving cavity 701 which is equidistant from the signal pin, and the receiving cavity 701 is separated by a partition. A guide key 702 is also provided on the side of the insulating platen 7 facing the plug-in end of the connector, and the guide key 702 divides the receiving cavity 701 into two rows, each row of receiving cavities corresponds to a row of signal pins, and each receiving cavity 701 accommodates one signal pin. The two opposite side surfaces of the guide key 702 serve as guiding slopes 704 for guiding the raised contact portion 501 of the signal pin to enter the receiving cavity 701, and the guiding slope 704 is inclined with a lower front and a higher rear. The insulating platen 7 is arranged along the Figure 7 When assembled in the direction shown, the raised contact portion 501 of the signal pin 502 slides into the corresponding accommodation cavity 701 along the guide slope 704 of the guide key 702. A slot for inserting the front end of the printed circuit board 2 is provided on the side of the insulating pressing plate 7 facing the printed circuit board 2, and the slot is connected to the accommodation cavity 701, so that the raised contact portion 501 of the signal pin contacts the contact pad 201 of the printed circuit board 2.

[0048] like Figure 7 As shown, the length of the insulating platen 7 is adapted to the distance between the inner surfaces of the two guide blocks 101 on the connector housing 1. When installing the insulating platen 7, the two guide blocks 101 can limit the insulating platen 7 to ensure that the accommodating cavity 701 of the insulating platen 7 corresponds to the signal pin 502. The insulating platen 7 is also provided with positioning grooves 703 at both ends in the length direction, and a fixing groove 103 matching the positioning groove 703 is provided on the guide block 101. After the insulating platen 7 is assembled, the positioning groove 703 is opposite to the notch of the fixing groove 103, and the fixing pin 9 is inserted to fix the insulating platen 7 on the connector housing 1.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A printed circuit board solder-free connector, comprising a connector housing (1) and a printed circuit board (2), characterized in that: The contact plate (201) of the printed circuit board (2) contacts the terminal of the connector, and the rear end of the printed circuit board (2) is fixed by a circuit board fixing frame (3) in the connector housing (1), and the circuit board fixing frame (3) is provided with a slot capable of clamping the rear end of the printed circuit board (2).

2. A printed circuit board solderless connector according to claim 1, characterized in that: The contact pads (201) of the printed circuit board (2) are distributed on two sides of the circuit board, and the contact pads (201) on the two sides correspond one to one.

3. A printed circuit board solderless connector according to claim 1, characterized in that: The terminal is a signal pin component (5), the signal pins (502) of the signal pin component (5) correspond one-to-one with the contact disk (201), and the tail ends of the signal pins (502) are provided with raised contact portions (501) capable of elastically contacting the contact disk (201).

4. A printed circuit board solderless connector according to claim 3, characterized in that: The signal pins (502) of the signal pin component (5) are arranged in a row at intervals and fixed on an insert insulator (503), and the insert insulator (503) is fixed in the connector housing (1).

5. A printed circuit board solderless connector according to claim 4, characterized in that: Two signal pin components (5) are provided, and the insert insulators (503) of the two signal pin components (5) are assembled together through a convex-concave matching structure, so that the signal pins (502) on the two signal pin components (5) correspond to each other one by one; the spacing between the opposite signal pins (502) on the two signal pin components (5) in a natural state is smaller than the spacing between the corresponding contact pads (201) on the printed circuit board (2).

6. A printed circuit board solderless connector according to claim 3, characterized in that: The signal pin component (5) is provided with two rows of signal pins (502), the two rows of signal pins (502) are fixed on the same insert insulator (503), the two rows of signal pins (502) correspond one to one, and the insert insulator (503) is fixed in the connector housing (1); the spacing between the two rows of signal pins (502) in a natural state is smaller than the spacing between the contact plates (201) on both sides of the printed circuit board (2).

7. A printed circuit board solderless connector according to claim 4 or 5, characterized in that: A strong mounting structure is provided between the insert insulator (503) and the connector housing (1).

8. A printed circuit board solderless connector according to claim 7, characterized in that: The strong mounting structure is a convex rib (504) arranged on the insert insulator (503) or the connector housing (1).

9. The printed circuit board solderless connector according to claim 7, characterized in that: A signal pin mounting hole (102) for mounting the signal pin component (5) is provided in the connector housing (1), a guide block (101) is provided on each side of the signal pin mounting hole (102), and the distance between the inner surfaces of the two guide blocks (101) is adapted to the width of the front end of the printed circuit board (2).

10. A printed circuit board solderless connector according to claim 9, characterized in that: An insulating pressure plate (7) is also provided in the connector housing (1), and a receiving cavity (701) is provided on the insulating pressure plate (7) for receiving the tail end of the signal pin (502) and providing a deformation space for the raised contact portion (501) of the signal pin (502). The number of the receiving cavities (701) is consistent with the number of a row of signal pins (502) and corresponds one to one. The insulating pressure plate (7) is provided with a slot for inserting the printed circuit board (2).

11. A printed circuit board solderless connector according to claim 10, characterized in that: A guide key (702) is provided on a side of the insulating pressing plate (7) opposite to the slot, and the guide key (702) has a guide inclined surface (704) for guiding the signal needle (502) to enter the corresponding accommodation cavity (701).

12. The printed circuit board solderless connector according to claim 10, characterized in that: The length of the insulating pressure plate (7) is adapted to the distance between the inner surfaces of the two guide blocks (101) on the connector housing (1); positioning grooves (703) are respectively provided at both ends of the length direction of the insulating pressure plate (7); a fixing groove (103) matching the positioning groove (703) is provided on the guide block (101); the positioning groove (703) and the fixing groove (103) are connected by a fixing pin (9) to achieve the fixing of the insulating pressure plate (7) in the connector housing (1).

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