JP2013229250A - Striking type terminal metal fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide striking type terminal metal fittings that can suitably secure the contact load and displacement quantity of a striking plate part and enhance contact reliability.SOLUTION: Striking type terminal metal fittings have a tip cylinder part 11 and a spring part 12 housed in the tip cylinder part to freely and elastically deform in front-rear directions. A front end of the spring part 12 is exposed as a striking plate part 12a to the outside from a front end of the tip cylinder part 11. Mountain-shaped corrugated spring parts 12c, 12d having inclined plate parts 12cx, 12dx inclined to a terminal axis L are provided at a front part and a rear part of the spring part 12, and a rectangular corrugated spring part 12b having a vertical plate part 12bx perpendicular to the terminal axis L and a parallel plate part 12by parallel therewith are provided at an intermediate part, the mountain-shaped corrugated spring part and rectangular corrugated spring part being formed symmetrically about an intermediate point in the front-rear directions of the spring part and in the amplitude directions of the corrugations as a center P.

Description

  The present invention relates to a butted terminal fitting used in a butted connector.

  4 and 5 show a conventional example of an abutting type terminal fitting used in an abutting connector.

  The terminal fitting 100 shown here is used in the butting connector disclosed in Patent Document 1 below, and includes a terminal main body 110, a butting plate portion 120, and a spring portion 130.

  The terminal body 110 is formed by integrally forming a front end cylindrical portion 111 having a substantially rectangular tube shape and a wire crimping portion 112 extending from the rear end of the front end cylindrical portion 111 by press molding of a metal plate. As shown in FIG. 6, the terminal main body 110 is inserted into the terminal accommodating hole 201 of the connector housing 200 and is prevented from being detached, and is held in the terminal accommodating hole 201.

  The abutting plate portion 120 is connected to a mating terminal abutting surface (for example, a mating plate portion of the mating abutting type terminal fitting or a contact pattern exposed on the surface of the circuit board) (pressing) For the contact) to protrude from the tip of the terminal body 110. The abutting plate portion 120 is a portion that makes electrical contact by abutting against the mating terminal abutting surface during connection with the mating terminal abutting surface.

  The spring portion 130 has a corrugated structure that supports the abutting plate portion 120 on the terminal main body 110 so as to be elastically displaceable by abutting against the other terminal abutting surface. The spring portion 130 is formed as a wave spring in which a belt plate is bent in a wave shape along the front-rear direction, the rear end is fixed to the terminal body 110, and the front part of the rear end is elastically deformable in the front-rear direction. In this state, it is accommodated inside the distal end cylindrical portion 111. And the front end is exposed to the outside from the front end of the tip tube portion 111 as the abutting plate portion 120, and the abutting plate is elastically deformed in the front-rear direction by being abutted against the connection counterpart side. It is comprised so that the contact load according to elastic deformation may be given to the part 120. FIG. In particular, the spring portion 130 in the conventional terminal fitting 100 is configured as a mountain-shaped wave-shaped spring portion 131 having inclined plate portions 131a that are alternately inclined in the opposite direction with respect to the terminal axis along the front-rear direction.

Japanese National Patent Publication No. 10-504676

  By the way, in the conventional terminal fitting 100, since the whole spring part 130 is formed as the angle wave-shaped spring part 131, it is easy to bend in the front-back direction, and can ensure the displacement amount of the butting plate part 120 large. However, there is a problem that it is difficult to increase the contact load by the amount easily bent, and it is difficult to increase the contact reliability. Therefore, if the number of waveforms is reduced to increase the contact load, the displacement cannot be increased. If the number of waveforms is increased to increase the displacement, the contact load is reduced. .

  Therefore, an object of the present invention is to eliminate the above-mentioned problem, and can ensure both the contact load and the displacement amount of the abutting plate part appropriately, and can improve the contact reliability. It is to provide a terminal fitting.

The above-described object of the present invention is achieved by the following configuration.
(1) a cylindrical tip tube with an open front end;
The rear end is fixed, and the front side of the rear end is elastically deformable in the front-rear direction, and is housed in the front end tube portion, and the front end serves as a butting plate portion of the front end tube portion. A spring portion that is exposed to the outside from the front end and elastically deforms in the front-rear direction by the abutting plate portion being abutted against a connection partner, and applies a contact load corresponding to the elastic deformation to the abutting plate portion; Have
The spring portion is a butted terminal fitting formed as a wave spring in which the strip is bent into a wave shape along the front-rear direction,
A mountain-shaped wave-shaped spring portion having an inclined plate portion inclined with respect to a terminal axis along the front-rear direction in the front-rear direction of the spring portion, and a parallel plate portion parallel to a vertical plate portion perpendicular to the terminal axis The abutting-type terminal fitting is characterized in that a rectangular wave-shaped spring portion having the following is provided side by side.

  (2) The angle wave spring portion is provided at the front portion and the rear portion of the spring portion, and the rectangular wave shape spring portion is provided at an intermediate portion between the front portion and the rear portion of the spring portion. The abutment according to (1), wherein the portion and the rectangular wave-shaped spring portion are formed in a point-symmetric shape centering on an intermediate point between the front-rear direction of the spring portion and the amplitude direction of the waveform. Type terminal fittings.

  (3) The rectangular wave-shaped spring portion is formed in two ridges corresponding to one period of the waveform, and the inclined plate portion of the angle-shaped wave-shaped spring portion is 1 continuously from the vertical plate portions at both ends thereof. The butted terminal fitting according to (2) above, which is formed in a mountain shape.

  According to the terminal fitting having the configuration of (1) above, the rectangular wave-shaped spring portion is a combination of a vertical plate portion perpendicular to the terminal axis, a parallel plate portion parallel to the terminal axis, and a bent portion connecting them. Therefore, when elastically deforming in the front-rear direction, elastic reaction force is generated by bending partly (the horizontal plate part hardly deforms and only the vertical plate part mainly deforms). . On the other hand, the angle wave-shaped spring portion is composed of a combination of inclined plate portions that are alternately inclined in the opposite direction with respect to the terminal axis, and a bent portion that connects them, so when elastically deforming in the front-rear direction, Elastic reaction force is generated when the whole is bent (when all the inclined plate portions are deformed).

  That is, the rectangular wave-shaped spring portion has a structure in which a load is easily generated even though the deformation amount is not large, and thus is suitable for earning a contact load. In addition, the mountain-shaped wave-shaped spring portion has a structure that is easy to bend even though the generated load is small, and thus is suitable for securing the entire amount of displacement. Therefore, the amount of displacement can be secured by the angle wave shaped spring part and the role can be divided and set so as to secure the necessary load by the rectangular wave spring part, without increasing the length and width of the spring part. However, it is possible to obtain an appropriate contact load while securing an appropriate amount of displacement only by changing the shape of the waveform of the spring portion, thereby improving the contact reliability.

  According to the terminal fitting having the configuration of the above (2), the angle wave spring portion is provided between the front portion and the rear portion of the spring portion, and the rectangular wave spring portion is provided between them. Since the wave-shaped spring part is formed in a point-symmetrical shape with respect to the center of the spring part, the abutting plate part can be pressed and contacted with the connection partner side in a balanced manner, and stress is concentrated in part. Can be prevented. Moreover, it can prevent that the center of abutment board part shifts | deviates from a terminal centerline, and can ensure a proper contact state.

  According to the terminal fitting having the configuration (3), it is possible to ensure proper contact performance while keeping the spring portion to a minimum length.

  According to the present invention, it is possible to obtain an appropriate contact load while ensuring an appropriate amount of displacement only by changing the shape of the waveform of the spring part without increasing the length or width of the spring part. The contact reliability can be improved.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of one Embodiment of the butting type terminal metal fitting which concerns on this invention, Fig.1 (a) is a perspective view, FIG.1 (b) is the front view seen from the front, FIG.1 (c) is FIG. It is AA arrow sectional drawing of b). FIG. 2A is a side cross-sectional view showing the configuration of the distal end cylindrical portion and the spring portion of the terminal fitting of the same embodiment, and FIG. 2A is a view showing a state before the abutting plate portion of the front end of the terminal fitting is pressed against the substrate; FIG.2 (b) is a figure which shows the state made to press-contact. It is a figure which shows the expansion | deployment state before the bending process of the terminal metal fitting of the embodiment. It is a sectional side view of the conventional butting type terminal fitting. FIG. 5 is a side cutaway perspective view of the butted terminal fitting shown in FIG. 4. It is a sectional side view which shows the state which accommodated the butting type terminal metal fitting shown in FIG. 4 in the connector housing.

  Hereinafter, a preferred embodiment of a terminal connection structure according to the present invention will be described in detail with reference to the drawings.

  1 is an overall configuration diagram of a butted terminal fitting according to an embodiment, FIG. 1 (a) is a perspective view, FIG. 1 (b) is a front view seen from the front, and FIG. 1 (c) is FIG. b) is a cross-sectional view taken along the line A-A, FIG. 2 is an enlarged side cross-sectional view showing the configuration of the distal end cylindrical portion and the spring portion of the terminal fitting, and FIG. FIG. 2B is a diagram showing a state before pressing the abutting plate portion of the front end of the metal fitting, FIG. 2B is a diagram showing a state of pressing, and FIG. 3 is a diagram showing an unfolded state of the terminal metal before bending. is there.

  As shown in FIG. 1, the terminal fitting 1 includes a terminal main body 10, a butting plate portion 12 a, and a spring portion 12. As shown in FIG. 3, the terminal fitting 1 is configured by cutting a single metal plate with a carrier 70 in a state where the metal plates are connected by a carrier 70, and further bending the metal plate with the press machine. The part shown by 10 in FIG. 3 is a part that becomes a terminal body, and the part shown by 20 is a part that becomes a spring part.

  For example, the terminal fitting 1 is electrically connected to the circuit board 50 by abutting the abutting plate portion 12a exposed at the front end against a contact pattern (not shown) of the circuit board 50 as shown in FIG. As shown in FIG. 1, the terminal body 10 includes a substantially rectangular tube-shaped tip tube portion 11 having an open front end, an electric wire covering pressing piece 14 extending from the rear end of the tip tube portion 11, and conductor addition. It has a fastening piece 15 and is inserted into a terminal receiving hole of a connector housing (not shown) so as to be prevented from coming off and held in the terminal receiving hole.

  The abutting plate portion 12a is connected to a terminal abutting surface on the connection counterpart side (for example, an abutting plate portion of an abutting-type terminal fitting or a contact pattern exposed on the surface of the circuit board). For the (pressing contact), the terminal body 10 is disposed so as to protrude from the tip. The abutting plate portion 12a is a part that makes electrical connection by contacting the terminal contact surface of the counterpart when connecting to the terminal contact surface of the connection counterpart.

  The spring portion 12 is formed as a wave spring in which a band plate is bent in a wave shape along the front-rear direction, the rear end is fixed to the terminal body 10, and the portion on the front side from the rear end is elastically deformable in the front-rear direction. In this state, it is housed inside the distal end cylinder part 11. And the front end is exposed to the outside from the front end of the distal end cylindrical portion 11 as the abutting plate portion 12a, and the abutting plate portion is elastically deformed in the front-rear direction by being abutted against the connection partner. The contact load corresponding to the elastic deformation is applied to 12a.

  In this case, the spring portion 12 includes a rectangular wave spring portion 12b and angle wave spring portions 12c and 12d provided side by side in the front-rear direction. The rectangular wave-shaped spring portion 12b includes a vertical plate portion 12bx perpendicular to a central axis (hereinafter referred to as a terminal axis) L along the front-rear direction of the distal end cylindrical portion 11, and a parallel plate portion 12by parallel to the terminal axis L. , And a combination with a bent portion 12bz connecting them. Further, the mountain-shaped wave shaped spring portions 12c and 12d are configured by a combination of inclined plate portions 12cx and 12dx alternately inclined in the opposite direction with respect to the terminal axis L and bent portions 12cz and 12dz connecting them.

  The chevron-shaped wave springs 12c and 12d are respectively provided at the front part and the rear part of the spring part 12, and the rectangular wave-shaped spring part 12b is provided at the intermediate part between the front part and the rear part of the spring part. It is provided to connect the portion 12c and the rear chevron-shaped spring portion 12d. And the mountain-shaped wave-shaped spring parts 12c and 12d and the rectangular wave-shaped spring part 12b are formed in the point-symmetrical shape centering on the intermediate point of the front-back direction of the spring part 12, and the amplitude direction of a waveform. Further, the rectangular wave-shaped spring portion 12b is formed in two ridges corresponding to one cycle of the waveform, and is continuous with the vertical plate portions 12bx at both ends thereof, and the inclined plate portions 12cx of the angle-shaped wave-shaped spring portions 12c and 12d. , 12dx is formed for one mountain.

Next, the action at the time of abutting will be described.
FIG. 2A shows the state before being abutted against the circuit board 50, but the abutting plate part 12a at the front end is abutted against the circuit board 50 so that the spring part 12 is brought into contact with the circuit board 50 as shown in FIG. Deform. For example, the rectangular wave-shaped spring portion 12b is configured by a combination of a vertical plate portion 12bx that is perpendicular to the terminal axis L, a parallel plate portion 12by that is parallel to the terminal axis L, and a bent portion 12bz that connects them. Therefore, when elastically deforming in the front-rear direction, an elastic reaction force is generated by partly bending (the parallel plate portion 12by is hardly deformed and only the vertical plate portion 12bx is mainly deformed).

  On the other hand, the mountain-shaped wave-shaped spring portions 12c and 12d are composed of a combination of inclined plate portions 12cx and 12dx alternately inclined in the opposite direction with respect to the terminal axis L and bent portions 12cz and 12dz connecting them. When elastically deforming in the front-rear direction, an elastic reaction force is generated by bending the whole (by deforming all the inclined plate portions 12cx and 12dx).

  That is, the rectangular wave-shaped spring portion 12b has a structure in which a load is likely to be generated even though the amount of deformation is not large, and thus is suitable for earning a contact load. In addition, the mountain-shaped wave-shaped spring portions 12c and 12d are easy to bend even though the generated load is small, and thus are suitable for securing the entire amount of displacement. Therefore, the role can be set so as to ensure the necessary displacement amount by the mountain-shaped wave spring portions 12c and 12d and to secure the necessary load by the rectangular wave spring portion 12b. Therefore, even if the length and width of the spring portion 12 are not increased, an appropriate contact load can be obtained while ensuring an appropriate amount of displacement only by changing the shape of the waveform of the spring portion 12. Reliability can be improved.

  In particular, according to the terminal fitting 1 of the present embodiment, the angle wave spring portions 12c and 12d are provided at the front portion and the rear portion of the spring portion 12, and the rectangular wave spring portion 12b is provided between them. Since the shape spring portions 12c and 12d and the rectangular wave shape spring portion 12b are formed in a point-symmetric shape with respect to the center P of the spring portion 12, the abutting plate portion 12a is pressed against the circuit board 50 on the connection partner side in a balanced manner. It can be made to contact and it can prevent that stress concentrates on one part. Moreover, it can prevent that the center of the abutting board part 12a shifts | deviates from the terminal axis L, and can ensure a proper contact state.

  Moreover, in this terminal metal fitting 1, the rectangular wave-shaped spring part 12b is formed into two peaks corresponding to one cycle of the waveform, and the continuous wave-shaped spring parts 12c, 12d are connected to the vertical plate parts 12bx at both ends thereof. Since the inclined plate portions 12cx and 12dx are formed as one mountain, appropriate contact performance can be ensured while the spring portion 12 is kept to a minimum length.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, the number of waveforms of the rectangular wave-shaped spring part 12b and the mountain-shaped wave-shaped spring parts 12c and 12d is not limited to the above embodiment, and may be set to any number depending on required performance. Further, the arrangement order of the rectangular wave shaped spring portion 12b and the mountain shaped wave shaped spring portions 12c, 12d may be changed according to the required performance.

DESCRIPTION OF SYMBOLS 1 Terminal metal fitting 10 Terminal main body 11 Tip cylinder part 12 Spring part 12a Butting board part 12b Rectangular wave shaped spring part 12bx Vertical board part 12by Parallel plate part 12c, 12d Angle wave shaped spring part 12cx, 12dx Inclined board part 50 Circuit board ( Connection partner)
L terminal axis P center

Claims (3)

A cylindrical tip cylinder with an open front end;
The rear end is fixed, and the front side of the rear end is elastically deformable in the front-rear direction, and is housed in the front end tube portion, and the front end serves as a butting plate portion of the front end tube portion. A spring portion that is exposed to the outside from the front end and elastically deforms in the front-rear direction by the abutting plate portion being abutted against a connection partner, and applies a contact load corresponding to the elastic deformation to the abutting plate portion; Have
The spring portion is a butted terminal fitting formed as a wave spring in which the strip is bent into a wave shape along the front-rear direction,
A mountain-shaped wave-shaped spring portion having an inclined plate portion inclined with respect to a terminal axis along the front-rear direction in the front-rear direction of the spring portion, and a parallel plate portion parallel to a vertical plate portion perpendicular to the terminal axis The abutting-type terminal fitting is characterized in that a rectangular wave-shaped spring portion having the following is provided side by side.   The angle wave spring portion is provided at the front portion and the rear portion of the spring portion, and the rectangular wave shape spring portion is provided at an intermediate portion between the front portion and the rear portion of the spring portion, and the angle wave shape spring portion and the 2. The butted terminal fitting according to claim 1, wherein the rectangular wave-shaped spring portion is formed in a point-symmetrical shape centering on an intermediate point between the front-rear direction of the spring portion and the amplitude direction of the waveform. .   The rectangular wave-shaped spring portion is formed as two ridges corresponding to one period of the waveform, and the inclined plate portion of the ridge-shaped wave-shaped spring portion is formed as one ridge continuously with the vertical plate portions at both ends thereof. The butted terminal fitting according to claim 2, wherein

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