JP2002141149A - Jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure requiring a smaller substantial occupation area on a board of the jack, in the jack comprising an insulating material made body having a plug inserting space and a mounting auxiliary terminal for mounting the body on the board by soldering. SOLUTION: The mounting auxiliary terminal 3 comprises a pair of mounting arms 12 and 12 lockable with the body 2 and a main arm 16 connected between respective lower ends of the pair of mounting arms 12 and 12 to form a joined surface 16a for soldering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack having a main body made of an insulating material having a space for inserting a plug, and a mounting auxiliary terminal for mounting the main body on a substrate by soldering.

[0002]

2. Description of the Related Art In the above-mentioned jack, a main body made of an insulating material which cannot be generally soldered can be reliably mounted on a substrate via mounting auxiliary terminals formed of a solderable material such as a copper alloy. .

However, in the conventional jack, the tip of the mounting auxiliary terminal protrudes laterally outward from the bottom surface of the main body, and the connection to the board by soldering is performed through the protruding tip of the mounting auxiliary terminal. The substantial area occupied by the jack on the board, including the board area required for this soldering, will greatly exceed the projected area of the jack itself. Therefore, even if the size of the jack itself is reduced, the board area is reduced due to the board area that must be secured for bonding to the board. As a result, it has not been able to sufficiently and effectively contribute to miniaturization of final electric products.

[0004]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a jack having a substantially smaller footprint on the board, in view of the aforementioned disadvantages of the prior art jacks exemplified above. Is to provide.

[0005]

In order to achieve the above object, a jack according to the present invention has the features described in claims 1 to 6 in the claims. That is, a jack according to claim 1 of the present invention is a jack comprising a main body made of an insulating material having a space for inserting a plug, and an auxiliary mounting terminal for mounting the main body to a substrate by soldering, The mounting auxiliary terminal includes a pair of mounting arms that can be locked to the main body, and a main arm connected between respective lower ends of the pair of mounting arms to form a surface to be joined for soldering. And a characteristic configuration.

[0006] In order to have such a characteristic configuration,
In the jack according to the first aspect of the present invention, since the surface to be joined for soldering extends along the lower surface of the main body, the substrate area required for this soldering is determined by projecting the jack itself. It fits inside Jack's own projected area without protruding from the area at all. Therefore, it is not necessary to secure a region for bonding to the board outside the projected area of the jack itself. If the jack itself is miniaturized, the board area is reduced, or the mounting density of the board is increased. As a result, it is possible to sufficiently and effectively contribute to miniaturization of the final electric product. In addition, the main arm having the above-mentioned joining surface for soldering is locked to the main body through a pair of mounting arms extending integrally upward from both ends of the main arm. In contrast to the fixed form in which the surfaces to be joined extending from the pair of attached auxiliary terminals are individually soldered to the board, the jack after the soldering is completed (in particular, the jack such as the force to pry the plug is attached to the board). It is firmly fixed to the substrate (with respect to an external force that exerts a twisting action such as rotating in a plane parallel to the plane). Similarly, the main arm provided with the above-mentioned surface to be joined for soldering is locked to the main body through a pair of mounting arms integrally extending upward from both ends of the main arm. The flatness of the surface to be bonded to the substrate is higher than in the fixed form in which the surfaces to be bonded extending from the pair of mounting auxiliary terminals locked to the substrate are individually soldered to the substrate, and the soldering is more firmly performed. It is fixed to the substrate. In the above configuration, the surface to be joined for soldering is not out of the layout of the body of the jack, and the heating device for soldering cannot be pressed, but the soldering operation itself firstly involves:
This can be realized by temporarily placing the jack on the board with cream solder interposed between the mounting auxiliary terminal and the board, reflowing the cream solder with hot air, and then cooling.

[0007] Further, the main arm may be configured to have a pair of joined surfaces separated to the left and right. With this configuration, the mounting auxiliary terminal is soldered to the board by the two joined surfaces separated from each other, so that the solderability is further improved, and the jack is separated from the board by a force that pry the plug. It is hard to come off.

Further, the mounting arm of the mounting auxiliary terminal can be locked to the main body by displacing the mounting arm upward from below the main body, and the mounting arm is attached to the main body. When the locked jack is placed on the board, a projection is provided at a lower portion of the main body so as to support the respective joined faces from above so that the respective joined faces are parallel to the substrate. It can be.

According to this structure, the vertical positional relationship between the soldered joint-receiving surface of the mounting auxiliary terminal and the jack main body, which is obtained when the mounting auxiliary terminal is assembled to the jack main body, is defined as follows. The contact between the surfaces to be joined and the projections keeps them constant, and since each surface to be joined is always exactly parallel to the substrate, the flatness of the surfaces to be joined to the substrate is further improved, and soldering is performed. Thus, it is more firmly fixed to the substrate. Therefore, when soldering to the board is completed, the positional relationship between the board and the jack main body is always constant, and smooth insertion and removal of the plug is ensured. For example, if the above-mentioned projection is not provided, the mounting auxiliary terminal is not a part to be joined and a part to be joined,
Positioning is performed based on the fact that the connecting part connecting the parts to be joined comes into contact with the main body. There is a possibility that the relative positional relationship between the part and the lower surface of the main body may fluctuate.

[0010] Further, a concave portion capable of receiving the main arm of the mounting auxiliary terminal is formed on a lower surface of the main body,
The protrusion may be configured to protrude from the recess.

With this configuration, the distance between the main body and the mounting auxiliary terminal is reduced by a distance corresponding to the depth of the formed concave portion. As a result, the jack after soldering is closer to the substrate. And the resistance of the jack from peeling off from the substrate due to the force to pry the plug is further increased.

The solder used for the soldering is a solder which is reflowed by hot air supplied from the outside, and the recess is provided for guiding the hot air to the connecting portion of the mounting auxiliary terminal. And a guide air passage extending along the main arm. With this configuration, the hot air for reflow is reliably guided to the vicinity of the mounting auxiliary terminal by the guide air path, and the solder (eg, cream solder) attached to the lower surface of the mounting auxiliary terminal is easily heated. Efficiency is improved, and high fixing strength is secured by the solder for mounting. In addition, the recess is configured to function as a space for accommodating the solder that has been reflowed by the hot air so as not to flow out of the bottom surface of the main body of the jack.

[0013] Further, a cavity may be formed at a position corresponding to the concave portion on the lower surface of the main body so as to communicate the plug insertion space with the outside of the main body.

According to this structure, the concave portion for receiving the auxiliary mounting terminal or for forming the guide passage for hot air can be provided in a state in which the height of the main body is sufficiently reduced (in other words, the concave portion). For example, it can be provided on the lower surface of the main body (without setting a large height dimension to secure a wall thickness for injection molding). For example, if the height of the main body is sufficiently reduced in the same manner, and the main body having the lower surface formed with a concave portion for receiving the auxiliary mounting terminal or forming a guide wind path for hot air is connected to the plug, If injection molding is performed without forming a cavity for communicating the insertion space with the outside of the main body, the injection material does not spread to the lower surface portion of the extremely thin main body, for example, to lock the mounting auxiliary terminal. However, there is a possibility that defects such as a locking groove to be provided on the side surface of the main body may not be formed in a perfect shape.

[0015] Other features and advantages of the present invention include:
The description will become apparent from the description of the embodiment using the drawings.

[0016]

FIG. 1 shows a power jack as one embodiment of a jack according to the present invention.

(Schematic Structure of Power Jack) A power jack 1 shown in FIG. 1 is for supplying a DC current or the like to a digital camera or any other electric product, and is made of a body made of an insulating material such as a synthetic resin. 2 and an auxiliary mounting terminal 3 for mounting the main body 2 to the board 60 of the electric product by soldering. The main body 2 has a plug insertion space 4 into which the plug 50 is inserted. When the plug 50 is inserted into the plug insertion space 4, the sleeve portion 52 of the plug 50 is inserted into the plug insertion space 4.
And a first plate-shaped contact piece 8 (electrically connected to a pole P2 provided on the outer surface of the sleeve portion 52). 2 and 7
) Is provided.

The first plate-shaped contact piece 8 includes a rectangular window-shaped fixed portion 8a fixed to the main body 2, and a movable contact piece portion 8b integrally extending toward the inside of the window of the fixed portion 8a. Having. The movable contact piece portion 8b is configured to be elastically deformable in a direction approaching and separating from the pin-shaped contact piece 6, that is, the axis of the plug insertion space 4, with respect to the fixed portion 8a fixed to the main body 2. . In the vicinity of the rear end of the plug insertion space 4, a second plate-like contact piece 10 that does not directly contact the pole of the inserted plug 50 is provided.
Is arranged. As shown in FIG.
Before the insertion of the movable contact piece 8,
b is pressed against the second plate-shaped contact piece 10 by the urging force of the base end of the movable contact piece portion 8b itself to protrude toward the pin-shaped contact piece 6 so that the second plate-shaped contact piece 10b is pressed. The electrical connection with the plug 50 is maintained, but when the plug 50 is completely inserted into the plug insertion space 4, as shown in FIG.
The pole P2 provided on the outer surface of the sleeve portion 52 of the plug 50
Obtains an electrical connection between the plate-shaped contact piece 8 and the movable contact piece 8b, and at the same time, moves the portion from the center to the tip of the movable contact piece 8b in the direction away from the pin-shaped contact piece 6. So
The electrical connection between the movable contact portion 8b of the plate-shaped contact piece 8 and the second plate-shaped contact piece 10 is interrupted.

The pin-shaped contact piece 6, the first plate-shaped contact piece 8, and the second plate-shaped contact piece 10 are made of a solderable metal obtained by plating a copper alloy with silver or the like, as shown in FIG. The locking grooves 23, 2 formed in the rear end face 2c of the main body 2
The main body 2 is fixed to the main body 2 by press-fitting the main body 2 from behind the main body 2 into the inside of the main body 2. Further, the pin-shaped contact piece 6, the first plate-shaped contact piece 8, and the second plate-shaped contact piece 10 are provided with terminal portions 6c, 8c, 10c for connecting to electric elements on the substrate 60. In a state in which the contact pieces 6, 8, and 10 are fixed to the main body 2, the terminal portions 6c, 8c, and 10c extend laterally outward from the lower surface 2a of the main body 2 with a slight protrusion amount of about 2 mm. I have. Also,
As shown in FIG. 3 and FIG.
Is fixed to the substrate 60, the lower surface of each of the terminal portions 6c, 8c, and 10c, that is, the surface to be bonded that can be bonded to the substrate 60 by soldering, is fixed downward (about 0.
1 mm).

(Fixed structure between main body and mounting auxiliary terminal)
As shown in FIGS. 2 and 6 (a), the auxiliary mounting terminal 3
It is made of a solderable metal such as tin-plated copper alloy, and has a pair of mounting arms 12, 12 and a main arm 14 connected between the lower ends of the mounting arms 12, 12.
Consists of More specifically, a pair of mounting arms 1
The main arms 2 and 12 are integral with each other, and are formed by bending a single generally plate-shaped conductive metal member into a U-shape. And the main arm 14
Has a pair of joined surface forming portions 16, 16 extending from the lower ends of the pair of mounting arms 12, and an intermediate portion 18 extending between the pair of joined surface forming portions 16, 16. The intermediate portion 18 is connected to the bonded surface forming portion 1 via a bent portion.
Since the power jacks 1 and 6 are retracted toward the main body 2 (upward in FIG. 2), when the power jack 1 is placed on the board 60, as shown in FIG. Basically, it comes into contact with the substrate 60 only through the two joined surfaces 16a, 16a formed on the lower surfaces of the two joined surface forming portions 16, 16 separated from each other by the intermediate portion 18. As shown in FIGS. 5 (a) and 6 (a), the main arm 14 of the mounting auxiliary terminal 3 is provided on the lower surface 2a of the main body 2.
The recess 2b capable of receiving the
Is provided with two pairs of protrusions 22 protruding downward.

A pair of mounting arms 1 of the mounting auxiliary terminal 3
2 are locking mortise holes 2 provided on both side surfaces of the main body 2.
Locked within 1,21. Outer burrs 12a, 12a (an example of a locking mechanism) slightly larger than the width of the locking mortise holes 21, 21 are formed on both sides of each mounting arm 12 so as to protrude. Then, after the tip of the mounting arm 12 is pressed against the entrance of the locking mortise hole 21, 21, the mounting auxiliary terminal 3 is turned upward from below the main body 2, and each of the joined surface forming portions 16, 16 is moved upward. When pressed into each pair of projections 22, 22, as shown in FIGS. 5B and 6B, each of the mounting arms 12 bites into the inner surface of the locking mortise hole 21, 21. The function of preventing the burrs 12a, 12a from coming off and the surfaces to be joined 16, 16 by the projections 22, 22
The auxiliary mounting terminal 3 is fixed to the main body 2 based on the cooperation with the support of the mounting 6. That is, once the locking mortise 2
Pulling out of each of the mounting arms 12 press-fitted into the insides 1, 21 is restricted by the burrs 12a, 12a that bite into the inner surfaces of the locking mortise holes 21, 21. As described above, the respective joined surface forming portions 16 are supported by the projections 22, so that the respective joined surface forming portions 16 are
As shown in FIG. 6 (b), the main body 2 is fixed in a posture parallel to the lower surface 2a. Further, as shown in FIGS. 4 and 6 (b), the joined surfaces 16a, 16a 2 lower surface 2
It is arranged at a position protruding downward by the same amount (for example, 0.1 mm) from a.

(Method of Joining Power Jack to Substrate) A pin-shaped contact piece 6, a first plate-shaped contact piece 8, and a second plate-shaped contact piece 1
0 and the power jack 1 completed by attaching the attachment auxiliary terminal 3 to the substrate 60 in the following manner. As shown in FIG. 1, the terminal portions 6 of the pin-shaped contact piece 6, the first plate-shaped contact piece 8, and the second plate-shaped contact piece 10 are previously provided on the substrate 60.
c, 8c, 10c, and a plurality of terminal areas (P
AD) 60p is formed. The lower surface 2 of the main body 2
a is formed with two positioning projections 5 and 5, while the substrate 60 is formed with positioning through holes 60 h and 60 h. Then, a cream solder (not shown) is applied to each of these terminal areas with a constant thickness, and then the power jack 1 is positioned with its lower surface 2a facing the substrate 60 as shown in FIGS. Protrusions 5 and 5 are positioning through holes 6
It is arranged to be locked within 0h and 60h. With this arrangement, the terminal portions 6c, 8c, 10c and the surfaces 16a, 16a to be joined are sandwiched by the cream solder,
It is mounted on each terminal area 60p. Next, hot air for reflowing the cream solder is sent between the power jack 1 and the substrate 60 for a predetermined time.

As shown in FIGS. 4 and 6, the concave portion 2b formed on the lower surface 2a of the main body 2 receives the main arm 14 of the mounting auxiliary terminal 3 and simultaneously applies the hot air for bonding to the mounting auxiliary terminal. A guide air path extending along the main arm 14 of the mounting auxiliary terminal is formed in order to guide the area 3 to the vicinity of the joined surface forming portions 16, 16. Each bonded surface forming part 1
6 and 16 are heated by the hot air, and this heat is transferred from the respective bonded surface forming portions 16 and 16 to the respective bonded surfaces 16a and 16a.
If the cream solder is transmitted to the cream solder under a and reflowed, and solidified by cooling or forced cooling, the joined surfaces 16a, 16a are joined to the respective terminal regions 60p. In addition, these guide air passages are connected to the main body 2 of the power jack 1 by the cream solder reflowed by the hot air.
It is configured to also function as a space for accommodating this so that it does not flow out from inside the bottom surface 2b.

Further, as shown in FIGS. 5 (a) and 6 (a), a cavity 2D is formed in the lower surface 2a of the main body 2 for communicating the plug insertion space 4 with the outside of the main body 2. Since the cavity 2D is formed, the height of the main body 2 is kept sufficiently small (in other words, the height is set to be large in order to secure the thickness for injection molding). A concave portion 2b for receiving the auxiliary mounting terminal 3 and forming a guide wind path for hot air can be provided on the lower surface 2b of the main body 2.

As shown in FIG. 8, instead of the pair of mounting arms 12 of the mounting auxiliary terminal 3, two straight type mounting auxiliary terminals 33, 33 are provided on the main body 2 of the power jack 1 of the above embodiment. Is fixed, a power jack 30 of another form as shown in FIG. 9 can be formed. Each mounting auxiliary terminal 33 is connected to the body 2
The mounting arm 35 has an attachment arm 35 that can be attached to the locking mortise holes 21 and 21, and a joined portion 37 that extends integrally from the mounting arm 35.
The burrs 35a, 35a that bite into the inner surfaces of the first and the second 21 are provided. As shown in FIG.
Is, for example, a pair of mounting through holes 6 separately provided in the substrate 60.
The bonded portion 37 can be fixed to the substrate 60 by inserting the bonded portion 37 into 0i and 60i, and soldering the tip of the bonded portion 37 protruding to the back side of the substrate 60 to the back side of the substrate 60. Alternatively, it may be joined to the terminal region on the front side of the substrate 60 with cream solder via a joined surface obtained by bending the joined portion 37 inward or outward by 90 °.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a jack according to the present invention together with a plug and a substrate.

FIG. 2 is an exploded perspective view of the jack.

FIG. 3 is a rear view of the jack.

FIG. 4 is a side view of the jack.

FIG. 5 is a bottom view of the jack before and after the mounting auxiliary terminal is mounted.

FIG. 6 is a front view of the same jack before and after the mounting auxiliary terminal is mounted.

FIG. 7 is a partially broken plan view of the jack before and after the plug is inserted.

FIG. 8 is an exploded perspective view of the jack showing another form of the auxiliary mounting terminal.

FIG. 9 is a perspective view showing the jack of FIG. 8 together with a plug and a board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Jack 2 Main body 2a Lower surface 2b Depression 2D cavity 4 Space for plug insertion 6 Pin-shaped contact piece 8 First plate-shaped contact piece 10 Second plate-shaped contact piece 12 Mounting arm 16 Main arm 16a Joined surface 22 Projection 50 Plug 60 Substrate

Claims (6)

[Claims] 1. A jack comprising: a main body made of an insulating material having a space for inserting a plug; and a mounting auxiliary terminal for mounting the main body to a substrate by soldering, wherein the mounting auxiliary terminal includes a main body. And a main arm connected between lower ends of the pair of mounting arms to form a surface to be joined for soldering. Jack. 2. The jack according to claim 1, wherein the main arm has a pair of joined surfaces separated left and right. 3. A mounting arm of the mounting auxiliary terminal,
By displacing the mounting arm upward from below the main body, the mounting arm can be locked to the main body.When a jack having the mounting arm locked to the main body is placed on the board, The jack according to claim 1, wherein a projection supporting the respective joined surfaces from above is provided at a lower portion of the main body such that the respective joined surfaces are parallel to the substrate. . 4. The device according to claim 3, wherein a concave portion is formed on a lower surface of the main body, the concave portion being capable of receiving the main arm of the mounting auxiliary terminal, and the projection projects from the concave portion. Jack. 5. The solder used for the soldering,
A solder that is reflowed by hot air given from the outside, wherein the concave portion forms a guide air path extending along the main arm of the mounting auxiliary terminal to guide the hot air to the connecting portion of the mounting auxiliary terminal. The jack according to claim 4, wherein 6. The body according to claim 4, wherein a cavity for communicating the plug insertion space with the outside of the main body is formed at a position corresponding to the recess on the lower surface of the main body. Jack described.