CN102810783A - Electrical connectors and their contacts - Google Patents

Abstract

The invention relates to the field of electrical connectors, in particular to an electrical connector and a contact element thereof. The electrical connector comprises an insulator and contact elements. The insulator is provided with mounting holes. Each contact element is provided with a base part which is spliced into the corresponding mounting hole from back to front. Each base part is provided with a forwards-backwards extended axis. An elastic barb is arranged on the base part of each contact element, and is gradually inclined and overhung towards the radial periphery of the base part from front to back. A forwards-backwards extended guide groove opposite to the elastic barb is formed on the hole wall of each mounting hole. Each elastic barb is matched with the corresponding guide groove to prevent the corresponding contact element from rotating in the corresponding mounting hole. A stopping table is arranged at the rear end of the groove bottom of each guide groove, and is matched with the rear end of the corresponding elastic barb to stop the corresponding contact element to backwards move relative to the insulator. A stepped surface facing a rear part is arranged on the front part of the hole wall of each mounting hole, and stops the front end of the corresponding base part to forwards move relative to the insulator. The production cost of the electrical connector is lowered.

Description

Electrical connectors and their contacts

technical field

The invention relates to the field of electrical connectors, in particular to an electrical connector and a contact piece thereof.

Background technique

The housing, the insulator and the electrical contact are the three major components of the electrical connector. In the current electrical connector, most of the contacts are fixed and assembled together through the base and the insulator. The fixing method of the base and the insulator is mainly There are two types, namely press-fit method and injection-molded packaging method. As far as the press-fit method is concerned, it is mainly to open a step hole on the insulator, and set a shoulder protruding toward the radial periphery of the contact piece on the base of the contact piece. When assembling, one end of the shoulder of the base is covered by the step hole. The step surface on the wall of the hole is blocked, and the other end is fixed by an additional insulating plate. There are two fixing parts in this way, namely the insulator and the insulating plate. The assembly process is complicated, and both the insulator and the insulating plate need to be passed through a special Mold processing, which directly leads to the increase of the assembly process of the electrical connector, the increase of the production cycle and the increase of the manufacturing cost. In addition, in order to prevent the contact from rotating in the insulator, it is often necessary to set a special contact between the contact and the insulator. The anti-rotation structure also increases the complexity of the assembly process of the electrical connector to a certain extent. The injection molding packaging method is to directly inject the insulator on the contact piece through the corresponding mold. In order to prevent the contact piece from being bent during the packaging process, the diameter of the contact piece is generally required to be large and the material properties of the contact piece There are certain requirements. In addition, the contacts fixed in this way cannot be reused in different products. The above-mentioned series of reasons also lead to an increase in the cost of the electrical connector that uses injection molding to fix the contacts.

To sum up, the current method of fixing the contacts and insulators of the electrical connector directly leads to an increase in the production cost of the electrical connector and a decrease in market competitiveness.

Contents of the invention

The purpose of the present invention is to provide an electrical connector to reduce the production cost of the electrical connector.

At the same time, the purpose of the present invention is also to provide the above-mentioned contact element of the electrical connector.

In order to solve the above problems, the electrical connector of the present invention adopts the following technical solutions: the electrical connector includes an insulator and a contact piece, the insulator has a mounting hole, the contact piece has a base inserted into the corresponding mounting hole from back to front, and the base It has an axis extending front and back, and the base of the contact piece is provided with elastic barbs, which gradually extend obliquely to the radial periphery of the base from front to back, and the wall of the mounting hole is provided with corresponding elastic barbs, front and rear In the extended guide groove, the elastic barb cooperates with the corresponding guide groove to prevent the corresponding contact piece from rotating in the mounting hole. The end fits to stop the corresponding contact piece from moving backward relative to the insulator, and the front part of the hole wall of the mounting hole is provided with a step surface facing backward, and the step surface stops the front end of the base from moving forward relative to the insulator.

The outer wall surface of the base is provided with a finger key, the finger key is stuck in the corresponding guide groove and prevents the corresponding contact piece from rotating in the mounting hole together with the elastic barb, and the finger key moves toward the radial periphery of the base. The distance extending is less than the distance that the elastic barbs extend toward the radial periphery of the base.

The said finger-shaped key gradually overhangs obliquely towards the radial periphery of the contact piece from the back to the front and is locked in the corresponding guide groove through its overhanging end.

Both the elastic barb and the finger key are integrated with the base of the corresponding contact piece.

The contact piece is a hole contact piece, and the front end of the base is provided with a socket for the insertion of the adapter pin. The front face of the base of the contact.

The contact piece is a hole contact piece, and the front end of the base is provided with a jack for the adapter pin to be inserted into. Corresponds to the front end face of the base of the contact.

The contact piece of the present invention adopts the following technical solutions: the contact piece has a base for being inserted into the corresponding mounting hole from the back to the front, the base has an axis extending forward and backward, and the base is provided with elastic barbs , the elastic barbs gradually overhang obliquely toward the radial periphery of the base from front to back.

The outer wall of the base is provided with a finger key, the finger key and the elastic barb are located on the same side of the base, and the finger key extends to the radial periphery of the base less than the elastic barb extends to the radial periphery of the base. Extended distance.

The finger-shaped keys gradually extend obliquely toward the radial periphery of the contact piece from the rear to the front.

Both the elastic barb and the finger key are integrated with the base of the corresponding contact piece.

Since the electrical connector of the present invention is provided with elastic barbs on the base of its contacts, which are gradually obliquely suspended to the radial periphery of the base from front to back, the hole wall of the mounting hole of its insulator is provided with elastic barbs. Corresponding guide grooves extending forward and backward, on the one hand, the elastic barb cooperates with the corresponding guide groove to prevent the corresponding contact piece from rotating in the mounting hole, and on the other hand cooperates with the stop set at the rear end of the groove bottom of the guide groove to stop The corresponding contact moves backward relative to the insulator, and the front of the hole wall of the mounting hole is provided with a rear-facing stepped surface, which stops the front end of the base from moving forward relative to the insulator; therefore, the parts used to fix the contact are only There is one insulator, thereby reducing the number of fixed parts of the contact piece compared with the prior art, and can correspondingly reduce the molds for manufacturing the corresponding parts, save the time spent in manufacturing the corresponding parts, and thereby reduce the production cost of the electrical connector; In addition, the elastic barbs also play the role of anti-rotation and preventing the contact piece from coming out of the rear end of the insulator, so that it is unnecessary to set up a special anti-rotation part, which also simplifies the manufacture of the electrical connector on the other hand. The process and structure further reduce the manufacturing cost of the electrical connector.

Further, the said finger key can cooperate with the elastic barb to prevent the contact piece from rotating in the corresponding installation hole, on the one hand, it can balance the anti-rotation force received by the front and rear ends of the base, and on the other hand, it can also share the elastic barb The force is applied to protect the elastic barb, so that the distance that the finger key extends to the radial periphery of the base is smaller than the distance that the elastic barb extends to the radial periphery of the base, which prevents the finger key from being inserted and installed at the base of the corresponding contact piece Interference occurs between the hole and the bottom of the corresponding guide groove to avoid the problem of blocked insertion; the fingers can be further enlarged by gradually tilting the overhang to the radial periphery of the contact from the back to the front The distance between the fit between the finger key and the guide groove and the fit between the elastic barb and the guide groove makes the finger key and the elastic barb form a triangular structure. According to the principle of determining a plane by two intersecting straight lines, further Prevent the rotation of the contact piece relative to the corresponding mounting hole; since the contact piece is generally formed by one-time stamping during processing, it is possible to simplify the process by integrating the elastic barb and the finger key with the base of the corresponding contact piece. The forming process of the contact piece increases the production efficiency of the contact piece, thereby further reducing the manufacturing cost of the electrical connector.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the electrical connector of the present invention;

Fig. 2 is a schematic diagram of cooperation between the insulator and the contact in Fig. 1;

Fig. 3 is a schematic structural view of the insulator in Fig. 1;

Fig. 4 is a schematic structural diagram of the contacts in Fig. 1;

FIG. 5 is a schematic structural view of a contact member of Embodiment 2 of the electrical connector of the present invention;

Fig. 6 is a schematic structural view of Embodiment 1 of the contact piece of the present invention;

Fig. 7 is a schematic structural diagram of Embodiment 2 of the contact piece of the present invention.

Detailed ways

Embodiment 1 of the electrical connector of the present invention, as shown in FIGS. A contact piece 14 is installed in the hole 13, and the contact piece 14 is a hole contact piece, including a base, the base is cylindrical and has an axis extending along the front-back direction (plugging direction), and the front part has a The socket 14-1 has an elastic barb 15 on the outer peripheral surface of the base. In this embodiment, the elastic barb 15 is integrated with the base of the corresponding contact piece, and its rear end is located on the base of the contact piece 14. , the front end gradually extends from the front to the back to the radial (perpendicular to the front-to-back direction) periphery of the base where it is located and forms an overhanging structure. The outer wall of the base of the contact piece 14 is also provided with a finger key 16. In this embodiment The base of the finger key 16 and the contact piece 14 adopts an integral structure, the rear end of the finger key 16 is located on the base of the corresponding contact piece, and its front end gradually extends from the back to the front to the radial periphery of the base of the corresponding contact piece. It should be pointed out that the fingers and elastic barbs on the same contact are located on the same side of the contact, and the distance that the fingers extend to the radial periphery of the base is smaller than the distance that the elastic barbs extend to the radial periphery of the base. Among the example, the rear end of contact piece 14 is also provided with pin 17, and pin 17 makes this electrical connector can be used as on-board electrical connector; Groove 18, in the present embodiment, this guide groove 18 is the through groove on the front-rear direction, in addition, the rear portion of the groove bottom of guide groove 18 is provided with stopper 19, and in the present embodiment, the height of stopper 19 is lower than guide The depth of the groove, the front end of each mounting hole is provided with an inward-turning retaining edge; the contact piece 14 is inserted into the corresponding mounting hole from back to front, and during the insertion process, the finger key 16 first cooperates with the guide groove And do not interfere with the stop platform on the bottom of the groove of the guide groove, that is, the finger key 16 crosses the stop platform 19 at the bottom of the guide groove groove. The direction of the contact piece is gathered and crossed the block, and the elastic barb after crossing the block resets and expands under its own elasticity and withstands the front side of the block through the rear end, so that the block prevents the contact from moving The corresponding mounting hole moves backward, and at the same time, the inversion of the front end of the mounting hole covers the front end of the base of the contact and stops the base of the contact from moving forward in the mounting hole, thereby realizing the axis of the contact. In addition, the elastic barb and the overhanging end of the finger key are respectively located in the guide groove and cooperate with the guide groove to prevent the base of the contact piece from rotating in the corresponding mounting hole.

Embodiment 2 of the electrical connector of the present invention, as shown in Figure 5, differs from Embodiment 1 only in that the contacts used therein are pin contacts, and the front end of the base of the contact has pins extending forward part 21, when the contact piece is inserted into the corresponding mounting hole, its pin part 21 passes through the front end of the mounting hole.

Embodiment 1 of the contact element of the present invention is shown in FIG. 6 , the structure of the contact element is the same as that of the contact element in Embodiment 1 of the electrical connector, and will not be repeated here.

Embodiment 2 of the contact element of the present invention is shown in FIG. 7 , the structure of the contact element is the same as that of the contact element in Embodiment 2 of the electrical connector, and will not be repeated here.

Claims (10)

1. electric connector comprises insulator and contact, and insulator has installing hole; Contact have from after be inserted into the base portion the corresponding installing hole forward, the axis that extends before and after base portion has is characterized in that; The base portion of contact is provided with the elasticity hangnail; Elasticity hangnail the past tilts to overhang to the radial outer periphery of base portion backward gradually, and the hole wall of installing hole is provided with guide groove corresponding with the elasticity hangnail, that extend front and back, and the elasticity hangnail cooperates the corresponding contact of prevention in installing hole, to rotate with corresponding guide groove; The rear end of the bottom land of guide groove is provided with the retaining platform; The contact that this retaining platform and the rear end cooperation block of corresponding elasticity hangnail are corresponding is mobile backward with respect to insulator, and the hole wall front portion of installing hole is provided with the step surface towards the rear, and the front end of this step surface block base portion moves forward with respect to insulator.

2. electric connector according to claim 1; It is characterized in that; The outside wall surface of said base portion is provided with finger key; Said finger key is stuck in the corresponding guide groove and with the elasticity hangnail and together stops corresponding contact in installing hole, to rotate, the distance that the distance that finger key is extended to the base portion radial outer periphery is extended to the base portion radial outer periphery less than the elasticity hangnail.

3. electric connector according to claim 2 is characterized in that, said finger key from after tilt to overhang and be stuck in the corresponding guide groove to the radial outer periphery of contact gradually forward through its projecting end.

4. according to claim 1 or 2 or 3 described electric connectors, it is characterized in that said elasticity hangnail and finger key all are made as one with the base portion of corresponding contact.

5. electric connector according to claim 4; It is characterized in that; Said contact is the hole contact; The front end of base portion is provided with the jack that supplies adaptive contact pin to insert, said step surface by be located at the installing hole front end in the medial surface that turns edge form the front end face of the base portion that covers corresponding contact of turning edge in said.

6. electric connector according to claim 1; It is characterized in that; Said contact is the hole contact; The front end of base portion is provided with the jack that supplies adaptive contact pin to insert, said step surface by be located at the installing hole front end in the medial surface that turns edge form the front end face of the base portion that is covered with corresponding contact of turning edge in said.

7. the contact of electric connector as claimed in claim 1; This contact have be used for from after be inserted into the base portion of corresponding installing hole forward; The axis that extends before and after said base portion has; It is characterized in that base portion is provided with the elasticity hangnail, elasticity hangnail the past tilts to overhang to the radial outer periphery of base portion backward gradually.

8. contact according to claim 7; It is characterized in that; Portion's outside wall surface of said base portion is provided with finger key, and said finger key and elasticity hangnail are positioned at the place, the same side of base portion, the distance that the distance that finger key is extended to the base portion radial outer periphery is extended to the base portion radial outer periphery less than the elasticity hangnail.

9. contact according to claim 7 is characterized in that, said finger key from after tilt to overhang to the radial outer periphery of contact gradually forward.

10. according to Claim 8 or 9 described contacts, it is characterized in that said elasticity hangnail and finger key all are made as one with the base portion of corresponding contact.

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