KR20240003867A - Terminal hole damage prevention type terminal pin - Google Patents

Abstract

The present invention relates to a terminal hole damage prevention type terminal pin, and more specifically, to a terminal pin that maintains a stable electrical connection relationship without damaging the hole plating layer formed in the terminal hole during the process of press-fitting it into a terminal hole provided on a printed circuit board, etc. This is about terminal pins that can prevent damage to terminal holes.
In order to achieve the above object, the terminal hole damage-resistant terminal pin according to the present invention is a terminal pin, wherein a plurality of elastic cut pieces are formed by a cut groove, a pressure member insertion hole is formed at the center of the elastic cut piece, and shrinkage and A terminal body having an elastic pressing portion of an expandable structure; and a pressing member inserted into and fastened to the pressing member insertion hole of the terminal body.

Description

Terminal hole damage prevention type terminal pin {TERMINAL HOLE DAMAGE PREVENTION TYPE TERMINAL PIN}

The present invention relates to a terminal hole damage prevention type terminal pin, and more specifically, to a terminal pin that maintains a stable electrical connection relationship without damaging the hole plating layer formed in the terminal hole during the process of press-fitting it into a terminal hole provided on a printed circuit board, etc. This is about terminal pins that can prevent damage to terminal holes.

Conventionally, the soldering method was mainly used as a method of electrically connecting power lines, etc. to terminal holes in printed circuit boards, etc., but when the solder melts, the surrounding components deteriorate and the back of the printed circuit board is heated indiscriminately along with the gas generated. There was a problem in that it was emitted and damaged other nearby electrical and electronic devices.

In addition, the soldering method described above has the disadvantage of making it difficult to design a simple and rapid process due to dependence on manual work and increased work time, and requiring a large investment cost for process automation.

To solve the problems of this soldering method, a press fit connection structure using connector terminal pins has been proposed and is widely used.

When the terminal pin for the connector is inserted into the terminal hole formed on the printed circuit board by the pressurizing method, the electrical connection relationship is completed, thereby solving the problem of the soldering method.

However, terminal pins for connectors have the disadvantage of damaging the hole plating layer formed in the terminal hole during the process of inserting the terminal rod portion into the terminal hole, which not only causes corrosion and poor electrical connection, but also reduces durability.

To be more specific, the hole plating layer (P2) into which the connector terminal pin (not shown) is inserted is formed in the through hole (P1) drilled in the printed circuit board (P) as shown in Figure 1. It has a structure in which a copper layer (P21, copper thickness) is placed in contact with the hole (P1) and a tin layer (P22, tin thickness) is laminated on the outer surface of the copper layer.

As the hole plating layer (P) constructed as described above is inserted in an interference fit manner as the connector terminal pin (not shown) moves when pressed, the outer surface of the terminal pin presses on the surface of the tin layer (P22), causing damage. This subsequently causes corrosion of the inner copper layer (P21), ultimately leading to a lack of electrical stability and reduced durability.

Korean Registered Utility Model No. 20-0184193 “Terminal pin of printed circuit board” Korean Patent No. 10-1723042 “Mail terminal pin structure”

The present invention was proposed in light of the above contents, and its purpose is to provide a terminal hole damage-prevention type terminal pin that can stably maintain an electrical connection relationship without damaging the hole plating layer formed in the terminal hole when press-fitting. there is.

In order to achieve the above object, the terminal hole damage prevention type terminal pin according to the present invention is a terminal pin, a plurality of elastic cut pieces formed by a cut groove, a pressure member insertion hole is formed at the center of the elastic cut piece, and shrinkage and A terminal body having an elastic pressing portion of an expandable structure; and a pressing member inserted into and fastened to the pressing member insertion hole of the terminal body.

The elastic pressing part may be configured as a driven wedge having an upper-lower narrow structure that gradually narrows from the first locking protrusion provided at the top toward the lower part.

The pressing member is a binding rod inserted into the pressing member insertion hole, and is formed on the outer surface of the binding rod in an upper and lower beam structure that gradually widens toward the bottom, and is provided at the bottom so as to be seated and caught on the first locking protrusion when installing the terminal pin. 2 A driving wedge provided with a locking protrusion may be configured.

Preferably, the pressing member may be provided with a guide protrusion protruding upward and downward on the outer surface of the binding rod so as to be inserted into the incision groove.

The driving wedge may be formed in a trapezoidal shape on the upper part of the guide protrusion and have a structure in which the second locking protrusions are provided on the lower left and right sides.

A third locking protrusion having a third locking protrusion that maintains an engaged state with the first locking protrusion may be formed on the upper part of the driving wedge so that the pressing member does not deviate downward while temporarily assembled on the terminal body. there is.

Meanwhile, the pressing member is formed at the lower end of the binding rod and includes a stopper portion that is seated at the lower end of the elastic pressing portion during an upward pressing operation, protrudes at the upper end of the binding rod and spreads the lower portion of the elastic cut piece outward during assembly. Additional assembly protrusions may be provided.

The terminal body has the elastic pressing part formed at the lower part of the rod part, and the elastic pressing part is composed of four elastic cut pieces between the four cut grooves, and the driven wedge is provided on the lower side of the elastic cut piece and has an inner surface. It includes a cut piece body formed with a concave inner curved surface, and a pressure contact piece protruding outward from the cut piece body and having a convex outer curved surface formed on the outer surface so as to come into close contact with and press against the inner surface of the terminal hole during the upward pressing operation of the pressing member. It can be configured.

Here, the pressing member may be formed with the guide protrusion having the driving wedge on the outer surface of the binding rod to correspond to the quantity of the cutting groove and the elastic cutting piece.

According to the terminal hole damage prevention type terminal pin according to the present invention, the elastic pressurizing part in a contracted state is inserted into the terminal hole to prevent damage to the hole plating layer of the printed circuit board, and the elastic pressurizing part is expanded through a press-fitting operation of the pressing member. Since electrical connections can be stably maintained without damage to the plating layer, corrosion resistance, durability, and electrical stability can be significantly improved.

Figure 1 is a perspective view of the lower part to explain the structure of a terminal hole formed on a typical printed circuit board;
Figure 2a is a diagram for explaining the technical idea of a terminal hole damage-resistant terminal pin according to an embodiment of the present invention;
Figure 2b is a perspective view showing the temporarily assembled state of the terminal hole damage-resistant terminal pin according to an embodiment of the present invention;
Figure 3 is an exploded perspective view showing a terminal hole damage-resistant terminal pin according to an embodiment of the present invention;
Figure 4 is an enlarged perspective view showing the elastic pressing portion of the terminal hole damage-prevention type terminal pin according to an embodiment of the present invention;
Figure 5 is an enlarged perspective view showing a pressing member of a terminal hole damage-prevention type terminal pin according to an embodiment of the present invention;
Figure 6 is a view showing a state in which the pressing member is temporarily assembled to the elastic pressing part in the terminal hole damage-prevention type terminal pin according to an embodiment of the present invention;
Figure 7 is a view showing a state in which a terminal hole damage-resistant terminal pin according to an embodiment of the present invention is installed in a terminal hole of a printed circuit board;
Figures 8a and 8b are diagrams for explaining the operation of the terminal hole damage-prevention type terminal pin according to an embodiment of the present invention. Figure 8a shows the elastic pressing portion of the terminal hole damage-prevention type terminal pin in the terminal hole of the printed circuit board. 8b shows the assembled state in which the elastic pressing part is tightly fixed to the terminal hole of the printed circuit board by pressing a pressing member into the interior of the provisionally assembled elastic pressing part.

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings, FIGS. 2A to 8B, and the same components in FIGS. 2A to 8B are given the same reference numerals.

Meanwhile, in each drawing, detailed descriptions of the configuration and its operations and effects that can be easily understood by a person with ordinary knowledge in the field from general techniques are simplified or omitted. In addition, since the present invention is characterized by a terminal hole damage-resistant terminal pin, the related parts will be shown and explained, and the description of the remaining parts will be simplified or omitted.

Figure 2a is a drawing to explain the technical idea of a terminal hole damage-resistant terminal pin according to an embodiment of the present invention, and is a cross-sectional view schematically showing the assembled state on a printed circuit board, and Figure 2b is an embodiment of the present invention. A perspective view showing a provisionally assembled state of a terminal hole damage-prevention type terminal pin according to, Figure 3 is an exploded perspective view showing a terminal hole damage-prevention type terminal pin according to an embodiment of the present invention, and Figure 4 is an embodiment of the present invention. An enlarged perspective view showing the elastic pressing part of a terminal hole damage-prevention type terminal pin according to an embodiment of the present invention, Figure 5 is an enlarged perspective view showing a pressing member of a terminal hole damage-prevention type terminal pin according to an embodiment of the present invention, and Figure 6 is an embodiment of the present invention. A diagram showing a state in which the pressing member is temporarily assembled to the elastic pressing part in the terminal hole damage-prevention type terminal pin according to an example, Figure 7 shows the terminal hole damage-prevention type terminal pin according to an embodiment of the present invention in the terminal hole of the printed circuit board. This is a drawing showing the installed state. Hereinafter, in describing the terminal hole damage-resistant terminal pin according to the present invention, the vertical direction is based on the position of the rod portion 11 of the terminal body 1 in an upright state, and the direction of the rod portion is upward. , It should be understood that the explanation was made with the direction of the elastic pressure part facing downward.

Referring to Figures 1 to 7, the terminal hole damage prevention type terminal pin (c) according to an embodiment of the present invention has a hole plating layer (p2) formed in the terminal hole (p1) of the printed circuit board (p) during press fitting. It is intended to stably maintain the electrical connection relationship without damaging the terminal, and is composed of a terminal body (1) and a pressing member (2) assembled to the terminal body (1).

The terminal body 1 is composed of a rod-shaped rod portion 11 made of a conductive material, and an elastic pressing portion 12 formed at the lower part of the rod portion 11 and having a structure capable of contracting and expanding.

The elastic pressing portion 12 includes a plurality of elastic cut pieces 121 formed by the cut groove 122 and a pressure member insertion hole 123 formed at the center of the elastic cut pieces 121, and is preferably an elastic cut piece. The reorganization 121 is composed of four pieces, and is formed so that a pressure member insertion hole 123 is provided at its center.

The elastic pressing portion 12 is formed with a driven wedge 124 that is caught after the driving wedge 22 of the pressing member 2, which will be described later, slides and rises. Here, the meaning of the term driven wedge 124 is that the driving wedge 124 is a moving wedge, while the driving wedge 22 is a passive wedge that is caught (second locking step).

The driven wedge 124 is formed in an upper-lower narrow structure that gradually narrows from the first locking protrusion 125 provided at the top toward the bottom.

In addition, the elastic cut piece 121 is a rod-shaped member whose cross-sectional shape is approximately fan-shaped, and includes a cut piece body 1211 provided with a driven wedge 124 on the lower side and a concave inner curved surface 1211a formed on the inner surface, and pressurized A pressure adhesion piece 1212 protrudes outward from the cut piece body 1211 and has a convex curved surface 1212a formed on the outer surface so as to adhere to and press against the inner surface of the terminal hole (hole plating layer) when the member 2 is pressed upward. Equipped with In addition, the pressure contact piece 1212 is formed with an inclined portion 1212b whose predetermined radius of curvature gradually decreases toward the extreme end in a region (lower portion) corresponding to the formation portion of the driven wedge 124.

On the other hand, the pressing member 2 is a component inserted and bound into the pressing member insertion hole 123 of the terminal body 1, and is a binding rod ( 21) and a driving wedge 22 formed on the outer surface of the binding rod 21.

The binding rod 21 is formed to have an approximately round bar shape, and includes a conical pillar 211 whose outer diameter gradually decreases upward, and a driving wedge 22 extending at the top of the conical pillar 211. It is provided with a cylindrical portion (212).

The driving wedge 22 is formed on the outer surface of the binding rod 21 in an upper-lower-gwang structure that gradually widens from the top to the bottom, and is provided on the elastic pressing portion 12 when the terminal pin (c) is installed. A second locking protrusion (25) is provided at the bottom to be seated and caught on the first locking protrusion (125).

Preferably, the driving wedge 22 is formed in a trapezoidal shape on the upper part of the guide protrusion 23 formed on the binding rod 21, which will be described later, and has the above-mentioned locking protrusions 25 on the left and right sides of the lower end.

And on the upper part of the driving wedge 22, there is a third locking protrusion 26 that maintains the engaging state with the first locking protrusion 125 so that the pressing member 2 does not come off downward when temporarily assembled on the terminal body 1. A third locking protrusion 24 having a is formed.

On the other hand, the pressing member 2 includes a guide protrusion 23 formed on the conical column 211 of the binding rod 21, a stop 27 formed at the lower end of the binding rod 21, and a binding rod 211. It is provided with an assembly protrusion 28 formed on the upper part of.

The guide protrusion 23 protrudes lengthwise up and down from the outer surface of the conical column 211 of the binding rod 21 so as to be inserted into the cut groove 122 of the elastic pressing portion 12.

The stopper 27 is formed in a disk shape at the lower end of the binding rod 21, and is seated at the lower end of the elastic pressing part 12 when the pressing member 2 is pressed upward to perform a stopping action.

The assembly protrusion 28 protrudes from the upper end of the binding rod 21 in a substantially cone shape and serves to spread the lower portion of the elastic cut piece 121 outward during assembly.

Hereinafter, the operation of the terminal hole damage-prevention type terminal pin according to an embodiment of the present invention will be briefly described.

Figures 8a and 8b are diagrams for explaining the operation of the terminal hole damage-prevention type terminal pin according to an embodiment of the present invention. Figure 8a shows the elastic pressing portion of the terminal hole damage-prevention type terminal pin in the terminal hole of the printed circuit board. It shows the provisional assembly state inserted into, and Figure 8b shows the assembly state in which the elastic pressure section is closely fixed to the terminal hole (surface of the tin layer (P22)) of the printed circuit board by pressing the pressure member into the provisionally assembled elastic pressure section. .

The terminal hole damage-prevention type terminal pin (c) according to the present invention is manufactured separately from the terminal body (1) and the pressing member (2), and then the assembly protrusion (28) of the pressing member (2) is connected to the elastic cut piece (121). Assemble by press-fitting into the pressure member insertion hole (123) through the bottom. At this time, as shown in FIG. 6, the pressing member 2 is assembled in such a way that it hangs without being released downward because the third locking protrusion 26 is caught by the first locking protrusion 125 formed at the top of the driven wedge 124. A restrained state can be maintained. At this time, the driving wedge 22 of the pressing member 2 is in a state where the driven wedge 124 is not pushed out (see FIG. 6), so the elastic cut piece 121 is contracted inward and is in a gathered state.

When the terminal hole damage prevention type terminal pin (c) in this state is inserted into the terminal hole (p1) of the printed circuit board (p), the elastic pressing portion 12 is contracted as shown in Figures 6 and 8a. Since there is no physical pressure on the terminal hole (p1), it can be temporarily assembled without damage.

Thereafter, as shown in FIG. 8B, when the pressing member 2 is pushed upward, the driving wedge 22 of the upper and lower narrow structure moves up on the driven wedge 124 of the upper and lower narrow structure, as shown in FIG. 7. Likewise, the elastic cut piece 121 is pushed out and opened, and the curved surface 1212a is firmly fixed while pressing the inner surface of the hole plating layer p2. Subsequently, the second locking jaw 25 of the pressing member 2 is caught by the first locking jaw 125 of the driven wedge 124, and the electrical connection relationship by the elastic pressing part 12 is stably maintained.

As described above, the terminal hole damage-prevention type terminal pin (c) according to the present invention is inserted into the terminal hole in a state in which the elastic pressing portion 12 is contracted so as not to damage the hole plating layer (p2) of the terminal hole (p1) during the insertion process. After inserting into the (hole plating layer), the elastic pressure part (12) is expanded and pressed and fixed through the press-fitting operation of the pressure member (2), thereby stably maintaining the electrical connection relationship and protecting the hole plating layer from damage. Corrosivity and durability can be improved.

Terms such as “include,” “comprise,” or “have,” as used above, unless specifically stated to the contrary, mean that the corresponding component may be present, and do not exclude other components. It should be interpreted that it may further include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The configuration and operation of the terminal hole damage-resistant terminal pin according to an embodiment of the present invention described above have been described, but this is illustrative and those skilled in the art will understand the scope without departing from the technical spirit of the present invention. It will be appreciated that it is possible to substitute and modify some of the above-described embodiments.

Therefore, the scope of protection of the present invention should be understood to extend to the invention described in the patent claims and equivalents thereof.

1: terminal body 11: load part
12: Elastic pressurizing part 121: Elastic cut section
122: Cut groove 123: Pressure member insertion hole
124: Driven wedge 125: First locking jaw
2: Pressure member 21: Binding rod
211: Conical column 212: Cylindrical portion
22: Driving wedge 23: Guide protrusion
24: Third locking jaw forming protrusion 25: Second locking jaw
26: Third locking jaw 27: Stopper
28: Assembly protrusion c: Terminal hole damage prevention type terminal pin
P: Printed circuit board P1: Terminal hole
P2: Hole plating layer

Claims (5)

In terminal pins,
A terminal body having a plurality of elastic cut pieces formed by cutting grooves, a pressure member insertion hole formed at the center of the elastic cut pieces, and an elastic press portion having a structure capable of contracting and expanding; and
A terminal hole damage-prevention type terminal pin comprising a pressurizing member inserted into and bound to the pressurizing member insertion hole of the terminal body.
According to paragraph 1,
The elastic pressing part is composed of a driven wedge having an upper-lower narrow structure that gradually narrows from the first locking protrusion provided at the top toward the bottom,
The pressing member is a binding rod inserted into the pressing member insertion hole, and is formed on the outer surface of the binding rod in an upper and lower beam structure that gradually widens toward the bottom, and is provided at the bottom so as to be seated and caught on the first locking protrusion when installing the terminal pin. 2 A terminal hole damage-resistant terminal pin characterized by a driving wedge provided with a locking protrusion.
According to paragraph 2,
The pressing member has a guide protrusion protruding upward and downward on the outer surface of the binding rod so as to be inserted into the incision groove,
The driving wedge is formed in a trapezoidal shape on the upper part of the guide protrusion and has a structure in which the second locking protrusion is provided on the left and right sides of the lower end,
A third locking protrusion having a third locking protrusion is formed on the upper part of the driving wedge to maintain the engaging state with the first locking protrusion so that the pressing member does not come off downward when temporarily assembled on the terminal body. Terminal hole damage prevention type terminal pin.
According to paragraph 3,
The pressing member is a stopper formed at the lower end of the binding rod and seated at the lower end of the elastic pressing portion during an upward pressing operation, and an assembly stone that protrudes at the upper end of the binding rod and spreads the lower portion of the elastic cut piece outward during assembly. A terminal hole damage prevention type terminal pin characterized by an additional attachment.
According to clause 4,
The terminal body has the elastic pressing part formed at the lower part of the rod part, and the elastic pressing part is composed of four elastic cut pieces between the four cut grooves, and the driven wedge is provided on the lower side of the elastic cut piece and has an inner surface. It includes a cut piece body formed with a concave inner curved surface, and a pressure adhesion piece protruding outward from the cut piece body and having a convex outer curved surface formed on the outer surface so as to come into close contact with and press against the inner surface of the terminal hole during the upward pressing operation of the pressing member. ,
The pressing member is a terminal hole damage-prevention type terminal pin, characterized in that the guide protrusion having the driving wedge is formed on the outer surface of the binding rod to correspond to the quantity of the cutting groove and the elastic cutting piece.

Images