JP5307921B1 - Terminal holder, terminal holding structure and terminal arrangement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal holder that can ensure a reliable contact between a contact pin and a terminal, a terminal holding structure that facilitates a terminal mounting operation, and a CATV device.
A terminal holder for holding contact between a contact pin attached to a housing of a CATV device and a terminal mounted on a circuit board accommodated in the housing, and the terminal sandwiches the contact pin. It has two pairs of contact pieces that are arranged so as to be held opposite to each other, and there are several pairs of contact pieces in the axial direction of the contact pins, and the terminal holder is connected to one end side in the axial direction of two pairs of legs, and the other end side is It has an open arch shape and is wide enough to straddle the terminals between both legs, and there is an insertion part that can be inserted into the circuit board on the open end side of each leg. When the insertion portion is inserted into the mounting hole of the circuit board, both the leg portions are arranged on both outer sides of the contact piece so that the contact piece is prevented from spreading to both outer sides.
[Selection] Figure 1

Description

  The present invention relates to a terminal for ensuring contact between a contact pin of a plug attached to a housing of a communication device, for example, a CATV device, and a springy terminal mounted on a substrate attached to the housing. The present invention relates to a holding tool, a terminal holding structure that prevents the terminal from being opened using the holding tool, and a terminal arrangement structure thereof.

There are various types of CATV equipment such as amplifiers. Their equipment housing A (FIG. 4) are made of aluminum die-casting, in its peripheral wall B, plug connector C of plug connector C ₂ (typically for input and output for the plug connector C ₁ and the monitor for input and output Smaller diameter than _1. Hereinafter, both plugs are collectively referred to as a plug C). The plugs C (C ₁ , C ₂ ) are provided with contact pins D (D ₁ , D ₂ ), and these contact pins D (D ₁ , D ₂ ) connect the plugs C (C ₁ , C ₂ ) to the peripheral wall. By being attached to B, it protrudes inside the peripheral wall B.

In the case A, the circuit board E (FIG. 4) and the chassis F (FIG. 4) are housed and fixed as shown in FIGS. In addition to the electronic component G (FIG. 4), a front side terminal H is mounted on the surface of the circuit board E, and a back side terminal I is mounted on the back side. The front side terminal H is mounted on the front surface of the circuit board E, and the back side terminal I is mounted on the back surface. The plug C ₁ is attached to the lower part of the peripheral wall B, and the plug C is attached to the upper part of the peripheral wall B. _{This is} to connect to ₂ .

  There are the front side terminals H shown in FIGS. 6A to 6C (those with three contact pieces).

  The front terminal H shown in FIGS. 6A to 6C is formed by bending a single metal plate into a planar U-shape (including a substantially U-shape) and two below the opposing side walls J. One insertion piece K protrudes below the connecting wall J ′ between the insertion piece K and both side walls J, and the lower portions of the two side walls J are folded upward to form a C shape (substantially C shape). Contact pieces L) are disposed to face each other. Three contact pieces L are arranged in a line at regular intervals.

  As shown in FIG. 7 (a), the back-side terminal I includes a contact piece N divided into three pieces by folding a single metal plate into a substantially M-shaped side face, and four legs O. It is a leaf spring shape in which a pin fitting space P is provided between the contact pieces N. The back terminal I is accommodated in a resin box-shaped case Q as shown in FIGS. 7B and 7C, and the leg O is the bottom of the case Q as shown in FIG. 7D. The bent portion T of the contact piece N protrudes to the outside through the opening U (FIG. 7B) of the case Q by being inserted into the insertion hole S of R and protruding from the bottom surface R. Slits V are provided on both side surfaces of the case Q, and the slits V communicate with the opening U of the case Q.

In the circuit board E (FIG. 4), an elongated board opening W is opened, and in the chassis F, an elongated chassis opening X is opened. These openings W and X communicate with each other when the circuit board E is arranged and fixed to the chassis F, and when the chassis F with the circuit board is accommodated and fixed in the housing A, the openings W and X are shown in FIG. ) Cover the contact pins D (D ₁ , D ₂ ) as shown in (b). In this case, the pin fitting space Y (FIGS. 6A and 6C) of the front side terminal H covers the contact pins D (D ₁ , D ₂ ) and the contact pins D (D ₂ ) are opposed to each other. It is clamped and held by the spring force of the piece L (FIG. 6A) and comes into contact with the contact pin D so as to be electrically conductive. In addition, the pin fitting space P of the back terminal I (FIG. 7A) covers the contact pin D (D ₁ ), and the spring of the contact piece N (FIG. 7A) facing the contact pin D It is clamped and held by force so as to come into contact with the contact pin D so as to be electrically conductive.

Input / output and monitor cables are connected to the plug C (C ₁ , C ₂ ). Regardless of which line is used, it is desirable that both the front-side terminal H and the back-side terminal I are reliably in contact with the contact pins D (D ₁ , D ₂ ). When used for input / output, it is also desired that the contact resistance is small from the viewpoint of preventing heat generation.

Since the back side terminal I is accommodated in the case Q, even if the contact pin D (D ₁ ) is fitted in the pin fitting space P of the back side terminal I, the contact piece N does not spread outward, and the contact Secure contact between the pin D (D ₁ ) and the contact piece N is ensured. However, the front terminal H is without being accommodated in the case, naked shown in FIG. 6 (a) ~ (c) , for attachment to a circuit board E, the contact pin D (D ₂₎ is pin-fitting space When fitted in Y (FIGS. 6A and 6C), both contact pieces L facing the C-shape are expanded outward, and the contact pins D (D ₂ ) are sandwiched by both contact pieces L. The contact holding between the two becomes unstable due to weakening of wearing. When the contact becomes unstable, the contact resistance between the contact piece L and the contact pin D increases and heat is easily generated.

  Conventionally, in order to prevent the contact piece L of the front terminal H from spreading, a contact pin is sandwiched between a movable pressing plate and a pin receiving bracket (Patent Document 1), a fixing portion fixed to a substrate, and a pair of legs There has been proposed a connector (Patent Document 2) in which a part and a connecting part for connecting both leg parts are integrally formed of a conductive elastic body.

Japanese Patent Laid-Open No. 5-145783 (Patent No. 3116172) JP 2003-109715 A (Patent No. 4627393)

The case-side back terminal I shown in FIG. 7D is in contact with the contact pin D (D ₁ ) of the input / output terminal C ₁ attached to the lower part of the peripheral wall B of the housing A (FIG. 4). For convenience, it is mounted on the back surface of the circuit board E. When the circuit board E is soldered with the lead wires and terminals (usually protruding on the back side of the circuit board) of the electronic components mounted on the surface, the back side of the circuit board E is immersed in a solder bath and is subjected to jabing. If the back terminal I is mounted on the circuit board E before soldering, the solder adheres to the back terminal I during the jab attachment. For this reason, the back side terminal I cannot be mounted on the circuit board E before the jab is attached, and is mounted on the back surface of the circuit board E after the jab is attached, and the rear side terminal I protrudes from the surface of the circuit board E. The legs O must be manually soldered to the circuit board E (commonly referred to as “hand soldering”), and the mounting work on the circuit board E was troublesome because it was troublesome twice.

In order to increase the contact area between the contact piece N of the back side terminal I and the contact pin D (D ₁ ), it is conceivable to increase the number of the contact pieces N. As the contact pieces N become longer in the arrangement direction, the case Q becomes larger and the mounting space on the circuit board E becomes wider.

  The holding tool described in Patent Document 1 and the connector described in Patent Document 2 lack the versatility because the structure of the holding tool or the connector is unique to Patent Documents 1 and 2.

  An object of the present invention is to provide a terminal holder that can ensure reliable contact between a contact pin and a terminal, a terminal holding structure that can prevent the terminal mounted on a circuit board from spreading, and a terminal arrangement structure.

  A terminal holder according to the present invention is a terminal holder that holds contact between a contact pin attached to a casing of a CATV device and a terminal mounted on a circuit board accommodated in the casing. Comprises two pairs of contact pieces arranged to face each other so that the contact pins can be clamped and held, and there are several pairs of contact pieces in the axial direction of the contact pins, and the terminal holder is in the axial direction of two pairs of legs. It has an arch shape (downward U-shaped or substantially U-shaped) with one end connected and the other end open, and is wide enough to straddle the terminal between both legs, and on the open end side of each leg , There is an insertion part that can be inserted into the circuit board, and the both leg parts are arranged on both outer sides of the contact piece by inserting the insertion parts into the mounting holes of the circuit board across the terminals. The spread of both sides to the outside is prevented It is obtained by the.

  The insertion portion includes a pair of insertion pieces arranged opposite to each other, and both insertion pieces approach each other by pressurization and can be automatically restored by release. It can be inserted into the hole, and when the pressure is released after insertion, it is automatically restored so that it cannot be removed from the mounting hole.

  The terminal holding structure of the present invention holds contact between a contact pin attached to a housing and a terminal mounted on a circuit board accommodated in the housing with a terminal holder inserted in the circuit board. The terminal holder is the terminal holder, and the two pairs of legs of the terminal holder are arranged on both outer sides of the contact piece across the terminals mounted on the circuit board, In the arrangement state, the insertion part of the leg part is inserted into the mounting hole of the circuit board from the electronic component mounting surface of the circuit board so as to prevent the terminal from spreading to the outside.

In the terminal arrangement structure of the present invention , at least a monitor plug and an input / output plug are attached to a casing of a CATV device, and contact pins of the plug protrude into the casing, and the contact pins , In the terminal arrangement structure in which the terminals mounted on the circuit board in the housing are in contact with each other, the terminals mounted on the circuit board are at least monitoring terminals that contact the contact pins of the monitoring plug, An input / output terminal that contacts a contact pin of the input / output plug. The monitor terminal and the input / output terminal are both mounted on the electronic component mounting surface of the circuit board and covered from the outside of the electronic component mounting surface. It is held on the electronic component mounting surface by the terminal holder .

According to the terminal arrangement structure of the present invention, in the terminal arrangement structure, at least the monitor terminals and the input / output terminals are arranged in a horizontal row (substantially horizontal row) on the housing, and contact pins of the monitor plugs of the housing are provided. The contact pins of the input / output plugs are brought into contact with each other.

The terminal holder of the present invention has the following effects.
(1) If the insertion portion is press-fitted into the mounting hole of the circuit board, it is possible to prevent the terminal mounted on the circuit board from spreading to the outside, and the contact between the contact pin and the terminal can be reliably maintained.
(2) Since the contact between the contact pin and the terminal can be securely held, the contact between the contact pin and the terminal does not become unstable, the contact resistance is stabilized, and heat generation during energization is small.
(3) Even if the terminal is elongated in the axial direction of the contact pin, it is possible to prevent the terminal from spreading outward, and the contact between the terminal and the contact pin is ensured.
(4) Since it is attached to the mounting surface side of the electronic component, there is no inconvenience that only the terminals need to be mounted after the jab is attached and manually soldered separately from the mounting of the electronic component.

The terminal holding structure of the present invention has the following effects.
Since the opening of the terminal mounted on the circuit board is reliably prevented, the contact between the contact pin and the terminal is stable, and heat generation due to energization can be suppressed.

The terminal arrangement structure of the present invention has the following effects.
Since the terminal holding the contact pin can be mounted on the electronic component mounting surface of the circuit board, the terminal can be jabbed and soldered together with the electronic component. There is no trouble of soldering.

The exploded view which shows an example of the CATV apparatus provided with the terminal holding structure of this invention. (A) is a perspective view which shows an example of the terminal holding structure of this invention, (b) is a longitudinal cross-sectional view of a terminal holding structure, (c) is a perspective view which shows an example of the terminal holder of this invention, (d) is The front view of the terminal holder. An example of the terminal in this invention is shown, (a) is a perspective view, (b) is a side view, (c) is a top view. The exploded view which shows an example of the CATV apparatus provided with the conventional terminal holding structure. It is the longitudinal cross-sectional view of the conventional terminal holding structure, (a) is a longitudinal cross-sectional view which shows the connection state of the contact pin of a distribution connector, and a terminal, (b) shows the connection state of the contact pin of an input-output connector, and a terminal. FIG. FIG. 2A shows a conventional terminal, in which FIG. 1A is a perspective view when there are three contact pieces, FIG. 2B is a side view thereof, and FIG. An example of the conventional cased terminal is shown, Comprising: (a) is a perspective view of a terminal, (b) is an upper surface side perspective view of a case accommodating the terminal of (a), (c) is a back surface of the case The side perspective view and (d) are perspective views of the terminal with a case which accommodated the terminal of (a) in the case of (b).

(Embodiment of terminal holder)
An example of an embodiment of the terminal holder 1 of the present invention will be described with reference to the drawings. The terminal holder 1 of the present invention has the shape and structure shown in FIGS. 2 (c) and 2 (d), and the peripheral wall of the die cast casing A such as a CATV device shown in FIG. The input / output plug C ₁ attached to B and the contact pin D (D ₁ , D ₂ ) of the monitor plug C ₂ are fixed to the chassis F and fixed to the housing A. The terminal 2 mounted on the circuit board E is surely brought into contact.

The terminals 2 mounted on the circuit board E in FIGS. 2 (a) and 2 (b) are as shown in FIGS. 3 (a) to 3 (c), and a single metal plate 3 is bent in a substantially U shape in plan view. The two opposing elongated strips 4 are folded back upward in a substantially V shape, and the two opposing contact pieces 5 are formed in a substantially W shape in side view. Is provided with a fitting space 6 in which the contact pins D (D ₁ , D ₂ ) can be fitted. Although the number of the two contact pieces 5 facing each other as shown in FIGS. 3A to 3C is four in the longitudinal direction of the elongated piece 4, the number can be any number. The fitting space 6 has such a width that the contact pins D (D ₁ , D ₂ ) can be press-fitted and can be held tightly in contact with the contact pieces 5 arranged to face each other by press-fitting. Below the bent portion of the metal plate 3, three protrusions 7 project. These protrusions 7 are inserted into the mounting holes Z (FIG. 2A) of the circuit board E and mounted on the circuit board E. After mounting, the circuit board E is jabbed in a solder bath to mount the electronic component G. When soldering to the circuit board E, it is soldered simultaneously.

The shape of the terminal 2, the number of contact pieces 5, the width, the interval, the interval (horizontal width: width) of the fitting space 6, the number of projections 7, the position, etc. are contact pins fitted in the fitting space 6. It can be designed according to the diameter, length, etc. of D (D ₁ , D ₂ ).

  The terminal holder 1 shown in FIG. 1 includes a pair of two leg portions 8 (FIG. 2 (c)) arranged to face each other with a gap therebetween, and one end side in the axial direction of both leg portions 8 is connected and the other end side is opened. Arched (downwardly U-shaped, substantially U-shaped), and the space between both leg portions 8 is wide enough to straddle the terminal 2, and the insertion portion 9 is connected to the open end (lower end) of each leg portion 8. There is.

  The lower ends of the two leg portions 8 are provided with a spring property that approaches each other when pressurized from both outer sides and returns to the original state when the pressure is released.

  The insertion portion 9 includes two pairs of insertion pieces 9a arranged opposite to each other, and both insertion pieces 9a come close to each other when pressed from both outer sides, and are automatically restored when released. (Restorability) is provided. The tip of each insertion piece 9a has a tapered wedge shape, and locking hooks 9b are formed on both outer sides. The insertion piece 9a can be press-fitted into one mounting hole M (FIG. 2 (a)) of the circuit board E in an approaching state. When the pressurization is released after the press-fitting, the insertion piece 9a is automatically restored by the spring property, and The locking rod 9b is locked to the peripheral edge of the mounting hole M so that it cannot be removed from the mounting hole M. The material of the terminal holder 1 is not particularly limited, but resin is suitable.

  The length (height) of the leg part 8, the distance between the leg parts 8, the width of the leg part 8, the depth dimension (thickness), etc. can be designed according to the shape, size, etc. of the terminal 2. .

(Embodiment of terminal holding structure)
An example of the terminal holding structure of the present invention will be described with reference to FIGS. This terminal holding structure is mounted on the circuit board E by preventing the two strips 4 of the terminals 2 mounted on the circuit board E from spreading outward by the terminal holder 1 inserted into the circuit board E. In this structure, contact between the terminal 2 and the contact pins D (D ₁ , D ₂ ) attached to the housing A (FIG. 1) is maintained.

  The terminal holding structure 1 shown in FIGS. 2C and 2D is used for the terminal holding structure of the present invention, and is mounted on the electronic component mounting surface of the circuit board E, as shown in FIGS. The terminal 2 is straddled by two opposing leg portions 8, and the insertion portion 9 of the leg portion 8 is inserted into the mounting hole M (FIG. 2A) on the width direction side of the terminal 2 and locked. The flange 9b is locked to the periphery of the mounting hole M so that it cannot be removed from the mounting hole M. At this time, the two leg portions 8 straddling the terminal 2 come into contact with both side surfaces of the terminal 2 so that the elongated piece 4 of the terminal 2 and the two elongated pieces 4 can be prevented from opening outward. .

(Embodiment of terminal arrangement structure)
The example shown in FIG. 1 as an example of the casing A of the present invention is basically the same as that shown in FIG. 4 except for the plug C ₁ for the input / output end and the plug for the monitor. C ₂ are arranged at the same height in a horizontal row, and their contact pins D (D ₁ , D ₂ ) are aligned at the same height in the horizontal example. As a result, the terminals 2 holding and holding the contact pins D (D ₁ , D ₂ ) can be mounted on the electronic component mounting surface of the circuit board E, and the terminals 2 can be mounted on the electronic component mounting surface of the circuit board E. Since the terminal 2 can be mounted and soldered together with the electronic component G after mounting, the trouble of manually soldering after the terminal 2 is attached to the electronic component mounting surface after the jubbing is eliminated.
In FIG. 1, the terminal holder 1 is provided only on the terminal 2 corresponding to the contact pin D (D ₁ ) of the input / output plug C ₁ , but the contact pin of the monitor plug C ₂ . It does not need to be provided in the terminal 2 corresponding to D (D ₂ ), and there is no particular restriction on the location where the terminal holder 1 is provided.

  The terminal holder 1 of the present invention is not limited to ensuring contact between the contact pin D of the plug of the CATV device and the terminal 2, but can also be used to ensure contact between the contact pin and the terminal of another communication device or electronic device. it can.

DESCRIPTION OF SYMBOLS 1 Terminal holder 2 Terminal 3 Metal plate 4 Elongated piece 5 Contact piece 6 Fitting space 7 Protrusion 7a Insert piece 8 Leg part 9 Insert part 9a Insert piece 9b Locking hook A Case B (Case) peripheral wall C Plug C ₁ (Input / output) Plug C ₂ (Monitor) plug D Contact pin D ₁ (Input / output) Contact pin D ₂ (Monitor) Contact pin E Circuit board F Chassis G Electronic component H Front side terminal I Back side terminal J Side wall J 'Connection wall K Insertion piece L Terminal contact piece M Mounting hole N Contact piece O Leg P Pin fitting space Q Case R (Case) bottom surface S Insert hole T Bending part U (case) opening V slit W board opening X chassis opening Y (front side terminal) pin fitting space Z mounting hole

Claims (5)

A terminal holder for holding contact between a contact pin attached to a casing of a CATV device and a terminal mounted on a circuit board accommodated in the casing;
The terminal includes two pairs of contact pieces arranged to face each other so as to sandwich and hold the contact pins, and the contact pieces have several pairs in the axial direction of the contact pins.
The terminal holder has an arch shape in which one end side in the axial direction of two pairs of legs is connected and the other end side is open, and the width between both the legs can span the terminal. There is an insertion part that can be inserted into the circuit board on the open end side of
By inserting the plugs into the mounting holes of the circuit board across the terminals, the legs are arranged on both outer sides of the contact pieces so as to prevent the contact pieces from spreading to both outer sides. ,
A terminal holder characterized by that. The terminal holder according to claim 1,
The insertion part includes a pair of two insertion pieces arranged opposite to each other,
Both insertion pieces approach each other by pressurization and can be automatically restored by release, and can be inserted into one mounting hole of the circuit board in the approached state, and automatically restored when the pressurization is released after insertion. So that it cannot be removed from the mounting hole.
A terminal holder characterized by that. The structure is such that the contact pins attached to the housing and the terminals mounted on the circuit board accommodated in the housing are held by a terminal holder inserted into the circuit board,
The terminal holder is the terminal holder, and two pairs of legs of the terminal holder are arranged on both outer sides of the contact piece across the terminals mounted on the circuit board. The insertion part of the part was inserted into the mounting hole of the circuit board from the electronic component mounting surface of the circuit board, so that expansion to the outside of the terminal could be prevented,
A terminal holding structure characterized by that. At least a monitor plug and an input / output plug are attached to the housing of the CATV device, and the contact pins of these plugs protrude into the housing and are mounted on the contact pins and the circuit board in the housing. in the terminal arrangement in which the terminal is in contact,
The terminal mounted on the circuit board is at least a monitor terminal that contacts the contact pin of the monitor plug, and an input / output terminal that contacts the contact pin of the input / output plug,
Both the monitor terminal and the input / output terminal are mounted on the electronic component mounting surface of the circuit board, and held on the electronic component mounting surface by a terminal holder covered from the outside of the electronic component mounting surface.
A terminal arrangement structure characterized by that. In the terminal arrangement structure according to claim 4,
At least the monitor terminal and the input / output terminal are in contact with each of the contact plug of the monitor plug and the contact pin of the input / output plug of the housing mounted in a horizontal row (substantially horizontal row) on the housing.
A terminal arrangement structure characterized by that.

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