TWI802337B - Fixing structure for large current terminal of waterproof connector - Google Patents

Abstract

A fixing structure for large current terminal of waterproof connector includes at least one solder terminal and one female connector, wherein the solder terminal possesses a ㄇ-shaped bottom bridge. The bottom bridge includes a plural of soldering feet and a locking hole with an internal thread through the top surface. The soldering feet are attached on a printed circuit board. The female connector has at least one female terminal, one side of which is recessed with a female terminal hole, and the other side of which is cut to form a fixing portion. A female terminal seat installs outside the female terminal. The female terminal is flatly attached to the bottom bridge by a screw through the fixing portion, which greatly increases the ease of combination and reliability and also reduces probability of poor contacts.

Description

High-current terminal fixing structure of waterproof connector

The invention relates to a high-current terminal fixing structure of a waterproof connector, in particular to a structure for fixing and combining the high-current terminal of the waterproof connector with a printed circuit board.

Press, in the past, the high-current terminals needed to be fixed with the wire harness by crimping, and the other end needed to be crimped with an R-type terminal and then locked on the circuit board. If the lap connection is loose or the welding is not correct, it is easy to produce series arc ablation wire The surface of the cable insulation layer will cause arc effects, or the terminals are directly welded to the circuit board at 90 degrees. Although it can reduce the arc effect that may be generated by the wiring method, the high-current terminals are fixed on the circuit board by welding, which is easy to encounter welding. If the range is too large, the phenomenon of empty or virtual welding may occur, resulting in the problem of poor contact.

Therefore, how to solve the problem of loose or inaccurate soldering of the locked terminals, to achieve the effect of a fixed connection between the high-current terminals and the printed circuit board, so as to avoid the arc effect from damaging the circuit and prevent the problem of poor contact after welding, and the terminals are repeatedly pulled out The shaking of the plug will also cause damage to the weld, which is what the industry is eager to break through.

Therefore the present inventor promptly in view of this, is thinking and the notion of invention, then designs with many years of experience, discusses in many ways and tries to do sample test, and corrects and improves many times, is to push out the present invention.

The main purpose of the present invention is to provide a high-current terminal fixing structure of a waterproof connector, so as to avoid damage to the circuit by the arc effect and prevent poor contact of the soldering part on the printed circuit board.

The high-current terminal fixing structure of the waterproof connector of the present invention includes at least one welding terminal and a female connector, wherein the welding terminal has a ㄇ-shaped locking platform, and the locking platform is protruded with several welding The pin and the top surface are provided with a locking hole that is tapped with an internal thread, and the soldering pin is welded on a printed circuit board; the female connector has at least one female terminal, and a female terminal is recessed on one side of the female terminal There is a certain thickness between the female terminal hole and the female terminal for the passage of large current. The other side of the female terminal is cut to form a fixed part. The fixed part also has a certain thickness for the passage of large current. Due to the cutting, there are two parallel and flat bonding surfaces on both sides, and a through hole is formed through the fixed part, and a female terminal seat is provided outside the female terminal, and a corresponding female terminal seat is provided on the inner side of the female terminal seat The terminal housing for the position and quantity of the female terminal is set on the female terminal with the terminal housing. A water stop ring is provided between the terminal housing and the female terminal seat for waterproofing. The female terminal is locked on the female terminal with a screw. On the soldering terminal, the screw has a screw head and a screw tooth, and the abutment surface is flatly attached to the locking platform, and the screw is passed through the through hole and fixed on the screw with the screw tooth. The locking hole, and using the screw head to abut against the other bonding surface can make the female terminal locked on the welding terminal more firmly, and the female terminal hole can be plugged into the female terminal base A male connector.

Preferably, the female terminal and the terminal housing are bonded with an adhesive. Make the two do combine.

Preferably, the through hole is also tapped with an internal thread in conjunction with the screw, so that the female terminal is locked on the solder terminal more firmly.

Preferably, the ratio of the terminal diameter of the female terminal to the through hole diameter of the through hole is between 5:2 and 5:3.

Preferably, there is a hole wall thickness between the female terminal and the hole of the female terminal, and the ratio of the terminal diameter of the female terminal to the hole wall thickness is between 50:3 and 50:8.

Optionally, the fixed portion is symmetrically cut, so the width of the two bonding surfaces is the same, and the width of the bonding surface is the square of the terminal diameter of the female terminal minus the square of the fixed portion according to the Pythagorean theorem. The square root of the square of the thickness, and the ratio of the thickness of the fixed part to the terminal diameter of the female terminal is between 3:10 and 6:10, so that the fixed part has enough thickness to support the passage of a large current, and the The width of the bonding surface is sufficient to fit the locking platform and the screw head so as to support the passage of large current and have the effect of firm combination.

Optionally, the fixing part is asymmetrically cut, so the widths of the two bonding surfaces are different, and the width of the bonding surfaces is respectively the square of the terminal diameter of the female terminal minus the The square root of the square of the length from the center of the fixed part to the bonding surface, and the ratio of the thickness of the fixed part to the terminal diameter of the female terminal is between 3:10 and 6:10, so that the fixed part has Sufficient thickness to support the passage of large currents, and the width of the bonding surface is sufficient to fit the locking table and the screw head to support the passage of large currents and have a stable combination. In addition, the width of the bonding surfaces is different, which can be adapted The size of the screw head and the locking platform can be flexibly adjusted.

Preferably, the outer side of the terminal shell is inclined at an angle of 1° to 3° relative to the female terminal base, which has the effect of being easy to insert and remove the male connector.

Preferably, a flange protrudes from the middle of the female terminal, and the flange is used to combine the female terminal and the terminal housing in a tightly fitting manner.

With this invention, the fixed part of the present invention is flattened and locked on the welding terminal, which not only prevents the arc effect, but also improves the problem of poor welding quality and poor contact caused by excessive welding range, and greatly increases the bonding strength. Reliability, to prevent the soldering part from detaching during repeated plugging and unplugging, making the connector useless.

Part of the invention:

(10): Welding terminal

(11):Locking table

(111): locking hole

(12): Welding feet

(20):Female connector

(21): female terminal

(211): female terminal hole

(212): fixed part

(2121):Fitting surface

(2122):Through hole

(213):Flange

(22): female terminal block

(221): terminal housing

(23): water stop ring

(24): screw

(241): screw head

(242): screw teeth

(25): Viscose

(30): Printed circuit board

(40):Male connector

(A): terminal diameter

(B): Through hole diameter

(C): hole wall thickness

(D): Fixed part thickness

(E): Angle

[Fig. 1] is a perspective view of the present invention.

[Fig. 2] is a three-dimensional exploded view of the present invention.

[Fig. 3] is a plane view of the female terminal of the present invention.

[Fig. 4] is a plan view of the female terminal hole of the present invention.

[Fig. 5] is a plan view of the fixing part of the present invention.

[Fig. 6] is a top sectional view of the present invention, and enlargedly shows the combination of the female terminal and the female terminal base.

[Fig. 7] is a front view of the present invention, showing the combination of the fixing part and the welding terminal.

[Fig. 8] is a plan view of the fixing part of another embodiment of the present invention.

[Figure 9] is a schematic diagram of the combination of the fixing part and the welding terminal in another embodiment of the present invention

[Fig. 10] is a three-dimensional assembly diagram of the present invention, showing the docking of the female terminal connector and the supply terminal connector.

In order to enable your review committee members to have a further understanding and understanding of the purpose, characteristics and effects of the present invention, please cooperate with the [simplified description of the drawings] to describe in detail as follows:

Generally, according to the present invention, firstly please observe from Fig. 1 to Fig. 7, which includes at least one soldering terminal (10) and a female end connector (20), wherein the soldering terminal (10) has A ㄇ-shaped locking platform (11), the locking platform (11) is protruded with several welding feet (12) and the top surface is penetrated with a locking hole (111) with internal threads, and the welding feet (12) ) is welded on a printed circuit board (30); the female terminal connector (20) has at least one female terminal (21), and one side of the female terminal (21) is recessed with a female terminal hole (211). There is a certain thickness between the female terminal hole (211) and the female terminal (21) for the passage of large current, and the other side of the female terminal (21) is cut to form a fixing part (212), and the fixing part (212) also has The fixed part (212) has two parallel and flat bonding surfaces (2121) on both sides due to cutting, and the fixed part (212) is provided with a through hole (2122) ), the female terminal (21) is provided with a female terminal seat (22) outside, and the female terminal seat (22) is provided with a terminal shell (221) corresponding to the position and quantity of the female terminal (21). The shell (221) is sleeved on the female terminal (21), and a water stop ring (23) is provided between the terminal shell (221) and the female terminal seat (22) for waterproofing, and the female terminal (21 ) is locked on the soldering terminal (10) with a screw (24), the screw (24) has a screw head (241) and a screw tooth (242), and the abutment surface (2121) is flatly pasted On the locking platform (11), use the screw (24) to pass through the through hole (2122) and screw the screw thread (242) to the locking hole (111), and use the screw The head (241) leaning against the other bonding surface (2121) can make the female terminal (21) locked on the welding terminal (10) more firmly, and the female terminal hole (211) and the female terminal The terminal block (22) can be inserted into a male end connector (40) (please observe it as shown in the 10th figure).

With the above structure, after the connectors are butted, due to the female terminal hole (211) and The female terminal (21) has a certain thickness and the fixed part (212) also has a certain thickness, so that a large current can pass through, and a water-stop is provided between the terminal shell (221) and the female terminal seat (22). The ring (23) is used for waterproofing, so it has a waterproof effect when it is docked, and by cutting out the fixing part (212) and the two bonding surfaces (2121), the bonding surface (2121) can be flattened On the locking platform (11), it is helpful for the large current to be completely transmitted through the contact surface. The top surface of the locking platform (11) is provided with a locking hole (111) with an internal thread. The screw (24) Passing through the through hole (2122) and screwing the screw thread (242) to the locking hole (111) can make the process of assembly and disassembly easier, and the screw head (241) rests against the The other bonding surface (2121) can make the female terminal (21) locked on the welding terminal (10) more firmly, and the female terminal (21) can be attached to the welding terminal (10) again Soldering the soldering feet (12) on a printed circuit board (30) avoids the problem that the high-current terminals may encounter arc effects when directly soldered on the printed circuit board (30), and also avoids large-scale welding and It causes bad welding, and greatly increases the ease and reliability of the combination. Because the high current will cause the terminal to overheat and cause the solder joint to melt slightly, the situation of unstable combination is also improved due to the improvement of reliability. In the process, the probability of poor contact caused by loose solder joints is reduced.

From Figure 2 and Figure 6, the present invention provides a large-current terminal fixing structure of a waterproof connector, wherein an adhesive is used between the female terminal (21) and the terminal shell (221) (25) Carry out bonding so that the two are truly combined.

The present invention provides a high-current terminal fixing structure of a waterproof connector, wherein the through hole (2122) is also tapped with an internal thread in conjunction with the screw (24), so that the female terminal (21) is locked to the welding terminal ( 10) more stable.

From the perspective shown in Figure 3, the present invention provides a large-current terminal fixing structure for a waterproof connector, wherein the terminal diameter (A) of the female terminal (21) is the same as the through hole of the through hole (2122) The ratio of the diameter (B) is between 5:2 and 5:3. If the through hole (2122) is too small, the connection will be unstable, and if the through hole (2122) is too large, the contact surface will be reduced and there will be no effect on the transmission of large currents. adverse effects.

From the view shown in Figure 4, the present invention provides a large-current terminal fixing structure of a waterproof connector, wherein there is a hole wall thickness (C) between the female terminal (21) and the female terminal hole (211), The ratio of the terminal diameter (A) of the female terminal (21) to the hole wall thickness (C) is between 50:3 and 50:8. If the hole wall thickness (C) is too small, it will lead to large current transmission. have adverse effects.

From the perspective shown in Figure 5, the present invention provides a large-current terminal fixing structure of a waterproof connector, wherein the fixing part (212) is symmetrically cut, so the width of the two bonding surfaces (2121) is the same, According to the Pythagorean theorem, the width of the bonding surface (2121) is the square root of the square root of the square of the terminal diameter (A) of the female terminal (21) minus the square of the fixing part thickness (D) of the fixing part (212), The ratio of the fixed part thickness (D) of the fixed part (212) to the terminal diameter (A) of the female terminal (21) is between 3:10 and 6:10, so that the fixed part (212 ) has sufficient thickness to support the passage of a large current, and the width of the bonding surface (2121) is sufficient to fit the locking platform (11) and the screw head (241) to support the passage of a large current and have a stable combination.

From Figure 8 and Figure 9, the present invention provides a large-current terminal fixing structure of a waterproof connector, wherein the fixing part (212) is cut asymmetrically, so the two bonding surfaces ( 2121) have different widths. According to the Pythagorean theorem, the width of the bonding surface (2121) is the square of the terminal diameter (A) of the female terminal (21) minus the center of the fixing part (212) to the bonding surface. The square root of the square of twice the length of the surface (2121), and the ratio of the fixed part thickness (D) of the fixed part (212) to the terminal diameter (A) of the female terminal (21) is between 3:10 to Between 6:10, make the fixing part (212) have sufficient thickness to support the passage of large current, and the width of the bonding surface (2121) is sufficient to fit the locking table (11) and the screw head (241) In order to support the passage of large current and have the effect of stable combination, and the two should be bonded The width of the surface (2121) is different, and can be flexibly adjusted according to the size of the screw head (241) and the locking platform (11).

From the view shown in Figure 6, the present invention provides a large-current terminal fixing structure of a waterproof connector, wherein the angle (E) of the outer side of the terminal shell (221) relative to the female terminal base (22) is 1 ° to 3°, it has the effect of being easy to plug and unplug the male end connector (40).

From the perspective shown in Figure 6, the present invention provides a large-current terminal fixing structure of a waterproof connector, wherein a flange (213) is protruded from the middle of the female terminal (21), and the flange (213) ) to make the female terminal (21) and the terminal shell (221) combined in a tight fit.

The invention provides a large-current terminal fixing structure of a waterproof connector, wherein the welding terminal (10) is formed by bending and punching a metal plate.

The invention provides a large-current terminal fixing structure of a waterproof connector, wherein, the female terminal (21) and the terminal shell (221) are reliably combined by means of ultrasonic welding.

The high-current terminal fixing structure of the above-mentioned waterproof connector has the following advantages: (1) Since there is a certain thickness between the female terminal hole (211) and the female terminal (21) and the fixing part (212) also has a certain thickness, so that a large current can pass; (2) by cutting out the fixing part (212) and the two bonding surfaces (2121), through which the bonding surface (2121) is evenly attached to the locking On the platform (11), it is helpful for the large current to be completely transmitted through the contact surface; (3) the top surface of the locking platform (11) is provided with a locking hole (111) with an internal thread, and the screw (24 ) passes through the through hole (2122) and is screwed into the locking hole (111) with the screw thread (242), which can make the assembly and disassembly process easier; (4) the screw head (241) is against the other The bonding surface (2121) can make the female terminal (21) locked on the welding terminal (10) more firmly, and the female terminal (21) can be attached to the welding terminal (10) The solder pins (12) Welded on a printed circuit board (30), thereby avoiding the problem that the high-current terminal may encounter an arc effect when directly soldered on the printed circuit board (30), and also avoiding the situation of poor welding caused by large-scale welding, and greatly Increase the ease and reliability of the combination, because the high current will cause the terminal to overheat and cause the solder joint to melt slightly and the situation of the unstable joint is also improved due to the improvement of reliability, reducing the contact caused by loose solder joints during the plug-in process The probability of occurrence of bad problems; (5) The proportional relationship between the terminal diameter (A), the through hole diameter (B), the hole wall thickness (C) and the fixed part thickness (D) ensures large current transmission, and also It has the effect of increasing the reliability of the combination.

Only the above is only a preferred embodiment of the present invention, and should not be used to limit the scope of the present invention; that is, all equivalent changes and modifications made according to the patent scope of the present invention should still belong to the present invention within the scope of the patent.

(10): Welding terminal

(11):Locking table

(111): locking hole

(12): Welding feet

(20):Female connector

(21): female terminal

(211): female terminal hole

(212): fixed part

(2121):Fitting surface

(2122):Through hole

(213):Flange

(22): female terminal block

(221): terminal housing

(23): water stop ring

(24): screw

(241): screw head

(242): screw teeth

(25): Viscose

(30): Printed circuit board

Claims (10)

A high-current terminal fixing structure of a waterproof connector, which includes at least one welding terminal and a female connector, wherein: The welding terminal has a ㄇ-shaped locking platform, the locking platform is protruded with several welding feet and the top surface is penetrated with a locking hole with an internal thread, and the welding feet are welded on a printed circuit board; The female terminal connector has at least one female terminal, and a female terminal hole is recessed on one side of the female terminal. A fixed portion is formed, and the fixed portion also has a certain thickness for the passage of large currents. The fixed portion has two parallel and flat bonding surfaces on both sides due to cutting, and a through hole is formed through the fixed portion. , the female terminal is provided with a female terminal seat, and the female terminal seat is protruded with a terminal shell corresponding to the position and quantity of the female terminal, and the terminal shell is sleeved on the female terminal, and the terminal shell and the A water stop ring is provided between the female terminal bases for waterproofing. The female terminal is locked on the welding terminal with a screw. The screw has a screw head and a screw tooth, and a bonding surface is flatly attached to the welding terminal. On the locking table, pass the screw through the through hole and fix it in the locking hole with the screw thread, and use the screw head to abut against the other fitting surface to lock the female terminal The welding terminal is more stable, and a male connector can be inserted into the female terminal hole and the female terminal base. The high-current terminal fixing structure of the waterproof connector according to claim 1, wherein the female terminal and the terminal shell are bonded with an adhesive so that the two are firmly combined. The high-current terminal fixing structure of the waterproof connector according to claim 1, wherein the through hole is also provided with an internal thread in conjunction with the screw tap, so that the female terminal is locked on the welding terminal more firmly. The high-current terminal fixing structure of the waterproof connector according to claim 1, wherein, The ratio of the terminal diameter of the female terminal to the through hole diameter of the through hole is between 5:2 and 5:3. The high-current terminal fixing structure of the waterproof connector as described in claim 1, wherein there is a hole wall thickness between the female terminal and the female terminal hole, and the ratio of the terminal diameter of the female terminal to the hole wall thickness is between Between 50:3 and 50:8. The high-current terminal fixing structure of the waterproof connector as described in claim 1, wherein the fixing part is symmetrically cut, so the width of the two bonding surfaces is the same, and the width of the bonding surface is given by the Pythagorean Theorem The square root of the square of the thickness of the fixing part is subtracted from the square of the terminal diameter of the female terminal, and the ratio of the thickness of the fixing part to the terminal diameter of the female terminal is between 3:10 and 6:10. The high-current terminal fixing structure of the waterproof connector as described in claim 1, wherein the fixing part is asymmetrically cut, so the width of the two bonding surfaces is different, and the width of the bonding surface is according to the Pythagorean Theorem Respectively, the square root of the square of the square of the terminal diameter of the female terminal minus the length of twice the length from the center of the fixing part to the bonding surface, and the thickness of the fixing part of the fixing part is equal to the terminal diameter of the female terminal The ratio is between 3:10 and 6:10. The high-current terminal fixing structure of a waterproof connector according to claim 1, wherein the angle at which the outer side of the terminal shell is inclined relative to the female terminal base is 1° to 3°. The high-current terminal fixing structure of the waterproof connector according to claim 1, wherein a flange protrudes from the middle of the female terminal, and the flange is used to make the female terminal and the terminal shell tightly fit combined in a way. The high-current terminal fixing structure of the waterproof connector according to claim 1, wherein the female terminal and the terminal shell are connected by ultrasonic welding so that the two are firmly combined.

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