JP2015135771A - Press-fit terminal - Google Patents

Abstract

Provided is a press-fit terminal that generates a minimum contact load for stable contact when inserted into a through hole within a dimensional tolerance range and generates a contact load that does not damage a substrate or the like. To do. First and second cantilever beams having elasticity and conductivity are inserted into a through hole. When the first and second cantilever beams are pressed toward each other, the tips of each other intersect. [Selection] Figure 1

Description

  The present invention relates to a press-fit terminal mounted on a board using a restoring force accompanying elastic deformation when inserted into a through hole of the board.

  In general, a press-fit terminal includes a spring portion made of an elastically deformable conductor. Using the elastic force generated when the spring portion is inserted into the through hole, the spring portion is brought into contact with the inner wall of the through hole.

  Here, the magnitude of the force acting to expand the spring portion in a direction orthogonal to the direction in which the press-fit terminal is inserted into the through hole is referred to as a contact load. Due to the contact load, the spring part is stably brought into contact with the conductor layer formed on the inner wall surface of the through hole. In order to stabilize the contact between the inner wall of the through hole and the spring portion, there is a lower limit on the contact load. Hereinafter, this is referred to as a contact load lower limit.

  Conversely, there is an upper limit for the contact load. If a press-fit terminal is pushed into a through-hole with an excessive contact load generated, the edge of the through-hole opening and the inner wall surface of the through-hole may act so that the spring part is scraped, resulting in damage to the board or press-fit terminal. There is. Specifically, the periphery of the through-hole opening and the inner wall surface of the through-hole, in particular, the plating layer formed on these portions are damaged. Moreover, the plating layer formed on the surface of the press-fit terminal is damaged. Furthermore, since the force in the direction of expanding the through hole acts excessively, it may cause cracking and whitening of the substrate. Here, the upper limit of the contact load that does not cause damage to the substrate or the press-fit terminal is called the upper limit of the contact load.

  As long as the elastic limit of the spring portion is not exceeded, Hooke's law is established, and the contact load is determined by the product of the displacement of the spring portion and the spring constant. Consider various press-fit terminals made of the same elastic material and having spring portions with different structures. When such a press-fit terminal is inserted into a through hole having the same diameter, the amount of displacement differs depending on the structure of the spring portion. In order to generate the same contact load in any press-fit terminal, the spring constant is increased if the displacement is small, and conversely if the structure is large, the spring constant is decreased.

  On the other hand, due to processing technology limitations, there are dimensional tolerances in the diameter of the through hole and the size of the spring portion. Even when such a dimensional tolerance is considered, even when the spring portion is inserted into the through hole having the maximum diameter, it is necessary to configure the spring portion so as to generate a contact load exceeding the lower limit of the contact load.

  A conventional press-fit terminal will be described.

(Patent Document 1)
Patent Document 1 describes a press-fit terminal having a spring portion having a double-supported beam structure as shown in FIG. In the press-fit terminal of Patent Document 1, for example, when the through-hole diameter is smaller than the reference value and the dimensions of the spring portion are the same as the reference value, a contact load larger than originally intended is generated. In particular, the spring part of this document has a double-supported beam structure, and since the amount of displacement of the spring part before and after insertion of the through hole is small, it is necessary to increase the spring constant of the spring part. When the spring constant is large, even if the deviation from the reference value is slight, the generated contact load changes greatly. With this type of press-fit terminal, the contact load changes greatly with a slight dimensional tolerance. As a result, a contact load exceeding the upper limit of the contact load may be generated.

  The problem of damage caused by contact load exceeding the upper limit of contact load is difficult to avoid with the press-fit terminal of Patent Document 1, even if the existence of dimensional tolerance is considered in advance. This is because, in the entire region from the upper limit to the lower limit of the dimensional tolerance, the contact load generated at the spring portion must be within the range between the lower limit of the contact load and the upper limit of the contact load. Even when the spring portion is inserted into the through hole having the maximum diameter within the dimensional tolerance range where the contact load is minimized, the spring portion must generate a contact load larger than the lower limit of the contact load. At the same time, the spring portion must generate a contact load that is smaller than the upper limit of the contact load even when it is inserted into a through hole having a minimum diameter within the dimensional tolerance range where the contact load is maximized.

  The relationship between the dimensional tolerance and the contact load in the press-fit terminal of Patent Document 1 is shown in the graph of FIG. When the press-fit terminal is inserted into the through hole, the point Q is displaced and a contact load is generated. In the graph, the horizontal axis indicates the distance of the point Q of the spring portion from the center line of the press-fit terminal. The vertical axis represents the magnitude of the contact load generated at point Q. On the horizontal axis, MIN represents the minimum diameter of the through hole within the range of dimensional tolerance, and MAX represents the maximum diameter of the through hole within the range of dimensional tolerance. In the vertical axis, U represents the upper limit of contact load, and L represents the lower limit of contact load.

  Point Q is at (Q0, 0) before the press-fit terminal is inserted into the through hole. Within the range of dimensional tolerance MIN <X <MAX, the curve must pass through the range of L <Y <U. However, the press-fit terminal of Patent Document 1 cannot be displaced greatly at the point Q due to its structure. For this reason, when the spring constant is set so as to pass through the point (MAX, L), the spring constant tends to increase, and as shown by the curve C, a contact load exceeding the contact load upper limit U is often generated. As a result, the substrate and the press-fit terminal are damaged as described above.

  Furthermore, the sudden increase of the contact load may cause the deformation of the spring portion to reach the plastic region. Since the spring part that has reached plastic deformation is permanently deformed, it does not return to the shape before insertion even if it is extracted after being inserted into the through hole. Therefore, this type of press-fit terminal may not be reused.

(Patent Document 2)
A press-fit pin 70 described in Patent Document 2 shown in FIG. 13 has a contact portion composed of an arcuate spring portion 71 and a support portion 72. In this structure, the spring portion 71 acts as a cantilever at the initial stage of deformation. However, the tip of the spring portion 71 and the support portion 72 come into contact with each other from the middle of the deformation and substantially act as a double-supported beam. For this reason, as shown in FIG. 14, the contact load increases rapidly, and the deformation of the spring portion 71 may reach a plastic region. Thereby, like the press fit terminal of patent document 1, the load given to a terminal or a board | substrate increases. Further, once inserted into the through hole, permanent deformation is caused, and there is a possibility that it cannot be reused.

  Therefore, in consideration of the dimensional tolerance of the through hole and the spring portion, it is difficult even in Patent Document 2 to configure a spring portion that satisfies both the contact load lower limit and the contact load upper limit. See especially paragraph 0042 of said document.

(Patent Document 3)
Patent Document 3 describes a press-fit terminal 80 having a distal end insertion portion 81 cut into a substantially V shape as shown in FIG. By making the tip insertion portion 81 a flexible structure, the force required for insertion into the through hole 82 is reduced while suppressing the reduction of the contact load. Hereinafter, in order to insert into the through hole, the force for pushing the press fit terminal into the through hole is referred to as an insertion force.

  Since the insertion force is reduced in the press-fit terminal 80 of Patent Document 3, it is possible to prevent damage to the periphery of the opening to some extent when inserting into the through hole 82. However, in order to generate a contact load similar to that of the press-fit terminal of Patent Document 1, it is necessary to increase the spring constant of the spring portion 83. Therefore, even in the press-fit terminal 80 of Patent Document 3, it is difficult to provide the spring portion 83 that satisfies both the lower limit of the contact load and the upper limit of the contact load in the entire range of the dimensional tolerance of the through hole 82.

JP 2008-165987 A JP 2006-92794 A JP 2005-174654 A

  The present invention has been made in view of such a situation, and the problem to be solved by the present invention is in the entire region from the upper limit to the lower limit when considering the dimensional tolerance of the spring portion of the through hole and the press-fit terminal. More than the minimum contact load (contact load lower limit) necessary to stabilize the connection between the press-fit terminal and the through-hole, and the press-fit terminal, the through-hole opening, the inner wall of the through-hole, and their An object of the present invention is to provide a press-fit terminal having a spring portion that generates a contact load equal to or lower than a contact load (contact load upper limit) that damages a plating layer formed on the surface.

  Another problem to be solved by the present invention is to provide a press-fit terminal that is less likely to be permanently deformed by insertion into and removal from a through hole.

  In order to solve the above-described problems, the present invention provides, as a first aspect, a press-fit terminal including a contact portion connected to a counterpart terminal and a terminal portion connected to a through-hole of a connection object. The spring portion is inserted into the through hole and has elasticity and conductivity. The spring portion has a first spring portion and a second spring portion formed to face the first spring portion. When the terminal portion is inserted into the through hole, each of the first spring portion and the second spring portion moves toward each other, and each tip of the first spring portion and the second spring portion intersects each other. A press-fit terminal is provided.

  In order to cross the tips of the first and second spring portions, it is conceivable to provide a receiving portion. That is, when the direction perpendicular to the plane including both the first spring portion and the second spring portion is the thickness direction, the respective tips of the first spring portion and the second spring portion are respectively Each is provided with a receiving portion for avoiding interference with the other side in the thickness direction.

  The receiving portion is provided by thinning the tip of the first spring part in one thickness direction and thinning the tip of the second spring part in the other thickness direction.

  Alternatively, the receiving portion is provided by bending the tip of the first spring portion so as to be shifted in one of the thickness directions and bending the tip of the second spring portion so as to be shifted in the other of the thickness directions. .

  The rear end of the receiving portion may interfere with each other when the first spring portion and the second spring portion are pressed toward each other. Thereby, the spring interference part which restrict | limits the movable range of a spring part can be provided.

  The first spring part may include a first convex part extending toward the second spring part, and the second spring part may include a second convex part extending toward the first spring part. Good. In this case, if each of the first and second spring portions is pressed toward each other, the first and second convex portions interfere with each other, and therefore the first and second convex portions serve as spring interference portions. Function.

  As a second aspect of the present invention, in a press-fit terminal including a contact portion connected to a counterpart terminal and a terminal portion connected to a through-hole of a connection object, two of elastic and conductive members are used. It is composed of a pair of cantilever beams and includes a spring portion that is inserted into the through hole. The lower limit of the contact load determined based on the stability of the contact between the inserted spring portion and the through hole is defined as the lower limit of the contact load. When the spring part is inserted into the through hole, or in the state where the spring part is inserted into the through hole, the upper limit of the contact load determined to prevent damage to at least one of the through hole and the spring part is called the contact load upper limit. When inserted into a through-hole having the maximum diameter within the range of dimensional tolerance, the spring part generates a contact load that is equal to or greater than the lower limit of the contact load and has a minimum diameter within the range of dimensional tolerance. When inserted into the through hole that the spring section provides a press-fit terminal, characterized by generating the following contact load contact load limit.

  According to the first aspect of the present invention, the tips of the first spring portion and the second spring portion intersect each other. For this reason, each movable range of the 1st spring part and the 2nd spring part can be enlarged. For this reason, each spring constant of a 1st spring part and a 2nd spring part can be set small. Reducing the spring constant reduces the difference between the contact load generated when inserted into the through hole with the smallest diameter within the dimensional tolerance and the contact load generated when inserted into the through hole with the maximum diameter. As a result, it is possible to obtain a press-fit terminal that generates a contact load in the range of the contact load lower limit to the contact load upper limit within the range of the dimensional tolerance of the through hole. Similar effects can be obtained in the second aspect of the present invention.

It is a figure for demonstrating the press fit terminal 1 which is one embodiment of this invention. It is a figure which shows the terminal part 200 of the press fit terminal 1 of FIG. 1, and is a figure for demonstrating the state which rotated the terminal part 200 45 degree | times centering on the virtual axis | shaft 4. FIG. It is a figure for demonstrating a state when the terminal part 200 of the press fit terminal 1 is seen from the front-end | tip part 8A, 8B side of the virtual axis | shaft 4. FIG. It is a figure for demonstrating the shape of the terminal part 200 of the press fit terminal 1 when it inserts in the through hole 11, and shows the state which faced the spring interference parts. Regarding the receiving portions 20A and 20B, which are spaces secured to accommodate the mating tip portions when the spring portions 2A and 2B are brought close to each other between the tip portions 8A and 8B and the spring interference portions 7A and 7B. It is a figure for demonstrating. It is a schematic diagram of the graph for comparing the spring characteristic of the spring part 2 of the press fit terminal 1, and the spring characteristic of the press fit terminal of patent document 3. FIG. It is a figure for demonstrating spring interference part 7A, 7B. It is a figure for demonstrating spring interference part 7A, 7B. It is a figure for demonstrating spring interference part 50A, 50B which is a deformation | transformation of a spring interference part. It is a figure for demonstrating the terminal part 600 of the press fit terminal 60 which is a deformation | transformation of the press fit terminal of this invention. It is a figure for demonstrating the press fit terminal of patent document 1. FIG. It is a figure for demonstrating the press fit terminal of patent document 1. FIG. It is a figure for demonstrating the press fit terminal of patent document 2. FIG. It is a figure for demonstrating the press fit terminal of patent document 2. FIG. It is a figure for demonstrating the press fit terminal of patent document 3. FIG.

  A press-fit terminal 1 according to an embodiment of the present invention will be described. The press-fit terminal 1 is made of an elastic metal material, for example, copper, a copper alloy, or the like. The press-fit terminal 1 is formed by punching a metal plate made of such a metal material. However, the cross-section of the completed press-fit terminal 1 does not have a uniform thickness, and as will be described later, spring interference portions 7A and 7B. The tip portions 8A and 8B have different thicknesses from the other portions.

  As shown in FIGS. 1 and 2, the press-fit terminal 1 includes a contact portion 100 connected to a counterpart terminal (not shown) and a terminal portion 200 connected to the through hole 11 of the substrate (connection object) 10. Have. The contact portion 100 has a pin shape, but may be a socket type terminal such as a spring contact, and the shape of the contact portion 100 is not limited to the embodiment. The terminal part 200 has a spring part 2 and a base part 3. Note that when the press fitting terminal 1 is inserted into the through hole 11 of the substrate 10, the base 3 abuts against a predetermined portion of a jig (not shown) or a housing (not shown) that holds the press fitting terminal 1 and presses the pressing force terminal 1. It plays the role of catching up. The spring part 2 has a structure in which two spring parts, that is, a first spring part 2A and a second spring part 2B are connected by a base part 3. The terminal portion 200 is axisymmetric with respect to the virtual axis 4. That is, it is a two-fold symmetry having a shape that overlaps with itself when it is rotated 360/2 around the virtual axis 4.

  The first and second spring portions 2A and 2B are cantilever beams supported by the base portion 3, respectively. The first spring portion 2A has a leg portion 5A, a substrate interference portion 6A, a spring interference portion 7A, and a tip portion 8A. Similarly, the 2nd spring part 2B has the leg part 5B, the board | substrate interference part 6B, the spring interference part 7B, and the front-end | tip part 8B.

  In FIG. 2, from the state of (A) corresponding to FIG. 1, the state rotated from the state of the tip portions 8A and 8B counterclockwise by 45 degrees up to 180 degrees around the virtual axis 4 respectively. It is illustrated as (B)-(E). Here, attention should be paid to the spring interference portions 7A and 7B and the tip portions 8A and 8B. In particular, as is clearly shown in FIGS. (B) and (C), in the first spring portion 2A, a uniform plate thickness is provided from the base portion 3 to just before the leg portion 5A, the board interference portion 6A, and the spring interference portion 7A. Subsequently, the plate thickness is changed by the inclination of the spring interference portion 7A, and the plate thickness that is reduced at the tip portion 8A is maintained. Similarly, as can be seen from (D), the second spring part 2B has a uniform plate thickness from the base part 3 to the leg part 5B, the board interference part 6B and the spring interference part 7B, and the spring interference part 7B. The plate thickness is changed by the inclination of, and the plate thickness reduced at the tip 8B is maintained.

  As shown in FIG. 4A, the substrate interference portion 6A interferes with the substrate around the through hole opening when the first spring portion 2A is inserted into the through hole 11 provided in the substrate 10 from the front end portion 8A side. And it plays a role of preventing the first spring portion 2A from entering the through-hole any more. Similarly, when the second spring portion 2B is inserted into the through hole 11 provided in the substrate 10 from the tip 8B side, the substrate interference portion 6B interferes with the substrate around the through hole opening, and the second spring portion. It plays a role in preventing 2B from entering the through hole any more.

  When each of the first and second spring portions 2A, 2B is pressed in the direction toward each other (that is, when moved by being elastically deformed), the spring interference portion 7A and the spring interference portion 7B interfere with each other. Thereby, the range of elastic deformation of the first and second spring portions 2A, 2B is limited.

  The tip portions 8A and 8B are both thinner than the other portions of the first and second spring portions 2A and 2B, but the thinning directions are opposite to each other. Referring to FIG. 1, the tip 8A is thinner in the direction from the front side to the back side of the drawing. Conversely, the tip 8B is thinner in the direction from the back side to the front side of the drawing.

  The tip portions 8A and 8B will be further described with reference to FIG. 3A and 3B correspond to FIGS. 2A and 2B, respectively. FIG. 3F is a view when FIG. 3A is viewed from the end portions 8A and 8B, and FIG. 3G is an enlarged view of FIG. 3F.

  As shown in FIG. 3G, in the first spring portion 2A, there is a space above the tip portion 8A, and the spring interference portion 7A is visible on the back side. In the second spring portion 2B, there is a space below the tip portion 8B, and the spring interference portion 7B is visible on the back side. As will be described later, when the first spring portion 2A and the second spring portion 2B are pressed toward each other, the space above the tip portion 8A accommodates the tip portion 8B, while the tip portion 8B The lower space accommodates the tip 8A, so that the tip 8A and the tip 8B intersect without interfering with each other.

  The intersection of the tip portion 8A and the tip portion 8B will be further described. When the press-fit terminal 1 is inserted into the through hole 11 of the substrate 10, the first and second spring portions 2 </ b> A and 2 </ b> B are pressed toward each other and elastically deformed, and the tip portions 8 </ b> A and 8 </ b> B approach the virtual axis 4. As shown in FIG. 4, they intersect without interference.

  As shown in FIG. 5A, a receiving portion 20A is provided above the tip portion 8A as a space for accommodating the tip portion 8B, while a tip portion 8A is provided below the tip portion 8B. A receiving portion 20B is provided as a space for housing. For this reason, tip part 8A, 8B can be elastically deformed to the range which exceeds the virtual axis 4 and overlaps with the other party spring part. As shown in FIG. 5B, when the distal end portion 8A is moved in the direction of the arrow 21A and the distal end portion 8B is moved in the direction of the arrow 21B, the left end portion of the distal end portion 8A in FIG. After that, it further moves to the left and eventually is accommodated in the receiving portion 20B. Similarly, the right end portion of the distal end portion 8B in the drawing moves further to the right beyond the virtual axis 4 and is accommodated in the receiving portion 20A. As shown in FIG. 5C, the tip portions 8A and 8B intersect each other. This is easy to understand when viewed from the front direction shown in FIG.

  Thus, by making the tip portions 8A and 8B intersect with each other, the movable range of the first and second spring portions 2A and 2B is increased as compared with a conventional press-fit terminal in which the tips of the spring portions do not intersect each other. be able to. For this reason, even if the spring constants of the first and second spring portions 2A, 2B are made smaller than the conventional one, a contact load equivalent to the conventional one can be generated. At this time, since the spring constant is small, the change in the contact load is small even if the through hole diameter varies due to dimensional tolerances.

  Point P in FIG. 1 indicates a position where the press-fit terminal 1 comes into contact with the inner wall of the through hole when the press fit terminal 1 is inserted into the through hole. The schematic diagram of FIG. 6 shows a graph depicting a straight line 30 with the distance from the virtual axis 4 to the point P as the horizontal axis and the contact load at the point P as the vertical axis. For comparison, the straight line 31 relating to the press-fit terminal described in Patent Document 3 is also described under the same conditions. In the figure, the lower limit of the contact load is the minimum value of the contact load required to keep the connection between the press-fit terminal and the through hole stable. The upper limit of the contact load is the maximum value of the contact load that does not damage the press fit terminal itself or the substrate when the press fit terminal is inserted into the through hole or in the inserted state. MAX on the horizontal axis indicates the upper limit of the diameter of the through hole within the range of dimensional tolerance, and MIN indicates the lower limit. The present invention and the press-fit terminal of Patent Document 3 were compared as those for generating a lower limit of contact load at the upper limit of the dimensional tolerance of the through hole.

  As described above, in the press-fit terminal 1 of the present invention, since the spring constant can be reduced, the absolute value of the slope of the straight line 30 can be reduced. In other words, the straight line 30 can be laid down. For this reason, it is easy to make the MIN, which is the lower limit of the dimensional tolerance, less than the upper limit of the contact load. On the other hand, in the press-fit terminal of Patent Document 3, it is structurally difficult to reduce the spring constant in order to satisfy the condition of the lower limit of the contact load, and the absolute value of the slope of the straight line 31 must be increased. 31 can not be laid down. As a result, a contact load exceeding the upper limit of the contact load is generated at the lower limit MIN of the dimensional tolerance, and the press-fit terminal and the substrate are damaged.

  As described above, in the press-fit terminal 1 of the present invention, the movable range is widened so that the tip portions 8A and 8B intersect each other, but the movement amount of the first and second spring portions 2A and 2B is large. Too much may cause permanent distortion.

  In view of this, it is preferable to limit the movable range of the tip portions 8A and 8B. The spring interference portions 7A and 7B are provided for this purpose. FIG. 7 (A ′) shows a state in which the end portions 8A and 8B corresponding to FIGS. 2 (A) and 3 (A) are crossed. Similarly, FIG. 7B ′ shows a state in which the end portions 8A and 8B corresponding to FIGS. 2B and 3B are crossed. FIG. 8 is an enlarged view of a portion surrounded by a dotted line 40 in FIG.

  As shown in FIG. 8, after the tip portions 8A and 8B cross each other, when the first and second spring portions 2A and 2B are further pressed closer to each other, the spring interference portions 7A and 7B finally come into contact with each other. To do. This prevents the first and second spring portions 2A and 2B from approaching further. At this time, as shown in FIG. 7 (A ′), the distance between the tips of the tip portions 8A and 8B and the distance between the first and second spring portions 2A and 2B at a position closer to the tip from the substrate interference portions 6A and 6B. The distances are almost equal. In this way, the press-fit terminal 1 can be inserted into the through hole without being affected by the thickness of the substrate.

  The deformation of the spring interference part is shown in FIG. The first convex portion 50A and the second convex portion 50B shown in the figure have a function corresponding to the spring interference portions 7A and 7B. The first convex portion 50A and the second convex portion 50B are convex portions provided so as to face each other inside the leg portions 5A and 5B or to face each other inside the substrate interference portions 6A and 6B. It is. In a state where the first spring portion 2A and the second spring portion 2B are not pressed toward each other, the first convex portion 50A and the second convex portion 50B are not in contact with each other. When the first spring portion 2A and the second spring portion 2B are pressed toward each other from this state, the first convex portion 50A and the second convex portion 50B eventually interfere with each other. It becomes like this. Thereby, like the spring interference portions 7A and 7B, the first and second convex portions 50A and 50B limit the range of elastic deformation of the first and second spring portions 2A and 2B.

  As mentioned above, although the press fit terminal of this invention was demonstrated according to embodiment, this invention is not limited to this.

  For example, in the press-fit terminal 1, the receiving portions 20A and 20B are formed by making the metal plate corresponding to the tip portions 8A and 8B thinner than other portions so that the tip portions 8A and 8B can cross each other ( (See FIG. 5). On the other hand, in the press-fit terminal 60 shown in FIG. 10, the tip portions 66A and 66B of the first and second spring portions 62A and 62B of the spring portion 62 of the terminal portion 600 are shifted in the opposite directions. Bending. In FIG. 10A, the tip 66A is bent so as to be pushed into the back side of the paper, while the tip 66B is bent so as to be pulled up to the front side of the paper. The tip ends of the leg portions 63A and 63B act as spring interference portions 65A and 65B. Further, the leg portions 63A and 63B have inclined portions that become narrower toward the distal end side, and these inclined portions function as substrate interference portions 64A and 64B.

  Further, the spring portions of the press-fit terminals 1 and 60 both have U-shaped cantilevers connected to the base portions 3 and 61, but the press-fit terminals of the present invention are limited to this. It is not something. For example, the spring portion may have a shape in which two pairs of cantilevers stand upright from a plane.

1, 60 Press-fit terminal 100 Contact part 200, 600 Terminal part 2, 62 Spring part 2A, 62A First spring part 2B, 62B Second spring part 3, 61 Base part 4 Virtual shaft 5A, 5B, 63A, 63B Leg Part 6A, 6B, 64A, 64B Substrate interference part 7A, 7B, 65A, 65B Spring interference part 50A First convex part 50B Second convex part 8A, 8B, 66A, 66B Tip part 10 Substrate (object to be connected)
11 Through hole 20A, 20B Receiving part 21A, 21B Arrow 30, 31 Straight line 40 Dotted line

Claims (7)

In a press-fit terminal comprising a contact portion connected to a counterpart terminal, and a terminal portion connected to a through hole of a connection object,
The terminal portion is inserted into the through hole, and includes a spring portion having elasticity and conductivity,
The spring portion includes a first spring portion and a second spring portion formed to face the first spring portion.
When the terminal portion is inserted into the through hole, each of the first spring portion and the second spring portion moves toward each other, and each of the first spring portion and the second spring portion. Press-fit terminals characterized in that the tips of each cross each other.   When the direction perpendicular to the plane including both the first spring portion and the second spring portion is the thickness direction, the tips of the first spring portion and the second spring portion, respectively. The press-fit terminal according to claim 1, further comprising a receiving portion for avoiding interference with each other side in the thickness direction.   The receiving portion is formed by thinning the tip of the first spring portion in one of the thickness directions and thinning the tip of the second spring portion in the other of the thickness directions. The press-fit terminal according to claim 2.   The receiving portion is bent so that the tip of the first spring portion is shifted to one side in the thickness direction, and is bent so that the tip of the second spring portion is shifted to the other side in the thickness direction. The press-fit terminal according to claim 2, wherein   The press-fit terminal according to claim 2, wherein the rear end of the receiving portion interferes with each other when the first spring portion and the second spring portion are pressed toward each other. The first spring portion includes a first convex portion extending toward the second spring portion,
The second spring portion includes a second convex portion extending toward the first spring portion,
2. The press-fit terminal according to claim 1, wherein when the first and second spring portions are pressed toward each other, the first and second convex portions interfere with each other. In a press-fit terminal comprising a contact portion connected to a counterpart terminal, and a terminal portion connected to a through hole of a connection object,
It consists of a pair of cantilevers made of elastic and conductive members, and includes a spring portion that is inserted into the through hole.
The lower limit of the contact load determined based on the stability of the contact between the inserted spring part and the through hole is the lower limit of the contact load,
When the spring part is inserted into the through hole, or in a state where the spring part is inserted into the through hole, an upper limit of the contact load determined to prevent damage to at least one of the through hole and the spring part is set. When we call the contact load upper limit,
When inserted into a through hole having a maximum diameter in the range of dimensional tolerance, the spring portion generates a contact load that is equal to or greater than the contact load lower limit
A press-fit terminal, wherein when inserted into a through hole having a minimum diameter within a range of dimensional tolerance, the spring portion generates a contact load equal to or less than an upper limit of the contact load.

Images