JP3727114B2 - Spring holder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spring holder for holding an electric wire or the like by sandwiching an electric wire or an optical fiber between adjacent wires of a coil spring-like member formed by winding the wire or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a technique using a coil spring has been proposed as a technique for maintaining a wiring made by an electric wire, an optical fiber or the like on a printed circuit board. For example, Japanese Utility Model Laid-Open No. 3-110879 discloses a wire-type cable clamp in which both ends of an elastic wire formed into a coil shape are bent at the ends pulled out in a direction perpendicular to the axis of the coil. Is disclosed. Two holes are drilled in the plate to which this is attached, and fixed by inserting both ends of the coil.
[0003]
[Problems to be solved by the invention]
However, according to the prior art, since the entire cable clamp is formed of a wire, the cable clamp is easily deformed. In particular, when an external force in a direction perpendicular to the axis is applied, both ends are deformed to hold the loose wiring. Ability will deteriorate. Moreover, since this cable clamp is integrated with the coil and the structure for attaching to the plate, there is a possibility that the coil will be deformed during attachment.
[0004]
Moreover, if tension is applied to the loose wires fixed between the wires, the cable clamp main body may bend in the direction, and the loose electric wires may be detached from the cable clamp main body. Further, when the tension is lost, the cable clamp main body may vibrate due to the reaction, and a large amount of loose wires may be disconnected.
[0005]
The present invention has been made in view of such a problem, and the spring holder according to claim 1 provides a spring holder that is not easily detached even when tension is applied to the held electric wire and that has excellent portability. It is aimed.
The spring holder according to claim 2 aims to save the installation space of the spring holder.
[0006]
Still further, the spring holder according to claim 3 aims to prevent a load from being applied to the electric wire and the coil spring even when a large number of electric wires are held.
The spring holder according to claim 4 is intended to hold electric wires of various sizes with one spring.
[0007]
[Means for Solving the Problems]
The spring holder according to claim 1 of the present invention, which has been made to solve such a problem, includes a coil spring and a fixing portion that fixes the coil spring to a fixed member, and is wound around the coil spring. In the spring holder that holds the electric wire, optical fiber, etc. between the wires,
A main body that is a rod-shaped member that penetrates the inside of the coil spring in the axial direction;
With
The fixing part is
It is provided at at least one end of the main body.
[0008]
Moreover, the present invention described in claim 2 is the spring holder according to claim 1,
A holding portion that holds the main body portion substantially perpendicular to the fixed member when the main body portion is fixed to the fixed member by the fixing portion;
Is further provided.
[0009]
Furthermore, the present invention described in claim 3 is the spring holder according to claim 2,
A spring support portion that makes the relative position between the one end on the holding portion side and the main body portion constant among both ends of the coil spring,
Further comprising
The coil spring can be extended in the other end direction.
[0010]
According to a fourth aspect of the present invention, in the spring holder according to any one of the first to third aspects,
The coil spring is wound at a non-uniform pitch.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The spring holder according to claim 1 includes a main body portion that is a rod-shaped member that passes through the inside of the coil spring in the axial direction, and fixing to the fixed member is a fixing portion provided at at least one end of the main body portion. To do.
[0012]
That is, while the conventional wire type cable clamp directly locks both ends of the coil to the plate, in the spring holder of the present invention, the coil spring is indirectly connected via the main body. Fix to fixed member.
Therefore, according to the spring holder of the first aspect, the coil spring is not deformed at the time of attachment. And since it is hard to deform | transform also when carrying by this, it becomes the thing excellent in portability. Even if tension is applied to the held electric wire, the main body portion prevents the coil spring from bending, and therefore the held electric wire is difficult to come off.
[0013]
According to a second aspect of the present invention, the spring holder includes a holding portion that holds the main body portion substantially perpendicular to the fixed member. That is, when the spring holder is fixed to the fixed member, the main body portion is in a standing posture.
Therefore, the spring holder according to claim 2 can be installed in a narrow space while maintaining the difficulty of detaching the electric wire and the like and the ease of attachment to the fixed member.
[0014]
In the spring holder according to claim 3, the spring holder according to claim 2 is further provided with a spring support portion. A spring support part makes constant the relative position of the end which becomes a holding | maintenance part among the both ends of a coil spring, and a main-body part. As an example of the structure of the spring support portion, it is possible to use a fixing tool for fixing one end of the coil spring to the main body portion, or to fix the holding portion to the main body portion and fix one end of the coil spring to the holding portion. It may be possible to make a simple configuration. The other end of the coil spring is not fixed. That is, one end of the coil spring is made immovable with respect to the main body, but can be extended in the other end direction.
[0015]
Accordingly, even if a large number of electric wires and the like are held by the coil spring, the coil spring can extend in the other end direction, so that no load is applied to the held electric wire and the coil spring.
In the spring holder according to the fourth aspect, normally, the coil springs wound at a constant pitch are wound at a non-uniform pitch. Here, non-uniformity means, for example, that the interval between adjacent lines gradually increases from one end of the coiled portion to the other end, or that the pitch is wide only in the middle of the coiled portion. It can be considered.
[0016]
For example, when holding a thick electric wire, it is sandwiched between locations with a wide pitch, and when holding a thin electrical wire, it is sandwiched between locations with a narrow pitch. In this way, an excessive force is not applied to the coil spring or the electric wire.
Therefore, according to the spring holder of the fourth aspect, the coil spring does not cause plastic deformation. Further, the electric wire held by the coil spring is not damaged.
[0017]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
First, FIG. 1 is a front view showing a state in which a spring holder 1 as a first embodiment of the present invention is attached to a printed wiring board A. FIG. However, the printed circuit board A is a cross-sectional view with the front side cut away so that the entire spring holder 1 can be seen.
[0018]
The spring holder 1 is provided at each of the coil spring 3, the main body portion 5 that penetrates the inside of the coil spring 3 in the axial direction, and both end portions 7 and 9 of the main body portion 5, and fixes the main body portion 5 to the printed wiring board A. The fixing part 11 and the flange part 13 are configured as main parts. The cross section (perpendicular to the axis) of the main body 5 is enlarged to such an extent that the expansion and contraction of the coil spring 3 is not hindered when it passes through the coil spring 3. In other words, in the state shown in this drawing, the coil spring 3 can expand and contract or move in the axial direction, but hardly moves in the direction perpendicular to the axis. Therefore, it cannot bend and vibration can be performed only in the axial direction.
[0019]
Next, how the coil spring 3 is removed from the spring holder 1 will be described with reference to FIG. FIG. 2A is a front view of this state seen from the same direction as shown in FIG. 1, FIG. 2B is an upper plan view thereof, FIG. 2C is a right side view thereof, and FIG. ) Is a right side view, and FIG. 2E is an enlarged view of the vicinity of the fixing portion 11. In FIG. 1, the flange portion 13 faces the same direction as the fixed portion 11, but in FIG. 2, it faces the longitudinal direction of the main plate 15 of the main body portion 5. This will be described later.
[0020]
The main body 5 includes a main plate 15 that is a substantially rectangular plate, ribs 17 that protrude perpendicularly from the main plate 15, and the both end portions 7 and 9 that are provided at both ends of the main plate 15.
The fixed portion 11 extends from the right end portion 7 downward in the figure, and then is bent into a substantially J shape. A step is formed at the tip 11a as shown in FIG. 2 (e). Is formed. Both sides 19a and 19b of the fixing portion 11 below the right end portion 7 are straightened, and when the spring holder 1 is attached to the printed wiring board A, it abuts against the printed wiring board A to stabilize the main body 5. Let
[0021]
On the other hand, the flange portion 13 extends in parallel to the main plate 15 from the left end portion 9 and can swing around a contact point with the left end portion 9 as an axis. That is, the swinging portion 13 can be oriented as shown in FIG. When the spring holder 1 is attached to the printed wiring board A as shown in FIG. 1, the contact portions 21 a and 21 b for stabilizing the main body portion 5 protrude from the side surface of the flange portion 13. Further, a substantially U-shaped clip 23 is provided on the flange 13 so that the rocked flange 13 does not swing in the reverse direction. When this is engaged with the substantially triangular protrusion 25 provided on the rib 17, the collar 13 is maintained in the posture shown in FIG. Note that the width of the flange portion 13 is substantially the same as the width of the fixed portion 11.
[0022]
Next, holes to be formed in the printed wiring board A in order to fix the spring holder 1 will be described with reference to FIG. FIG. 3 also shows a lower plan view of the main body 5 that is not shown in FIG. 3A is a view of FIG. 2A viewed from below, and FIG. 3B is a printed wiring board A viewed from the same direction.
[0023]
In order to fix the spring holder 1 to the printed wiring board A, a hole for inserting the fixing portion 11 and a hole for inserting and locking the flange portion 13 may be formed. Each hole is optimally rectangular, and the vertical dimension is slightly larger than the width of the object to be inserted (fixed portion 11 or flange 13). As already described, since the fixed part 11 and the flange part 13 have the same width, the vertical dimensions of the two holes are also the same. The horizontal dimension of the hole into which the fixing portion 11 is inserted is slightly smaller than the left end surface of the fixing portion 11 than the right end surface of the tip 11a (see FIG. 2). The lateral dimension of the hole into which the flange 13 is inserted is not particularly limited. However, if the dimension is the same as that of the hole for the fixing part 11, the holes can be made exactly the same as each other, which is convenient for processing.
[0024]
And these two holes are the dimension which added the thickness of the collar part 13 to the distance B from the left end surface of the fixing | fixed part 11 to the left end of the main plate 15, and the distance C between the left end edges of two holes Are formed to be equal. In this way, when the spring holder 1 is attached, the tip 11a pushes the right end surface of the hole, so that the whole spring holder 1 is pushed to the left, and the left end surface of the fixing portion 11 and the left end surface of the flange portion 13 are holes. The spring holder 1 is positioned by being pressed against the left end surface (see FIG. 1). The position in the vertical direction is also stabilized by making the hole dimensions and the widths of the fixed portion 11 and the flange portion 13 substantially the same.
[0025]
Next, how the coil spring 3 is inserted into the main body 5 is shown in FIG. As shown in this figure, when the coil spring 3 is attached, the coil spring is viewed from the direction of the flange 13 in a state where the flange 13 is in the posture shown in FIG. 2 (or FIG. 3A). 3 is inserted. When the insertion is completed, the collar portion 13 is swung so that the clip 23 is locked to the protrusion 25. As a result, the coil spring 3 is regulated by the right end portion 7 and the left end portion 9 so that it cannot be removed, and the coil spring 3 can be attached to the printed wiring board A.
[0026]
Next, an example of use of the spring holder 1 is shown in FIG. In this figure, the printed wiring board A is not shown in order to show the entire spring holder 1. The spring holder 1 can be used by being sandwiched on the upper side of the coil spring 3 like the electric wire 27, or on the lower side like the electric wire 27 '. When sandwiched between the coil spring 3 and the printed wiring board A, the electric wire 27 ′ may be pushed from the already installed state or the spring holder 1 may be removed from the printed wiring board A. The spring holder 1 may be attached to the printed circuit board A after being sandwiched between the coil springs 3. In the figure, only one piece is sandwiched vertically, but a plurality of electric wires 27 may be sandwiched on one side.
[0027]
According to the spring holder 1 that is configured as described above, the coil spring 3 is not directly attached to the printed wiring board A, but is attached via the main body portion 5 that penetrates the coil spring 3. There is no risk of the coil spring 3 being deformed at times. Moreover, since the main body 5 abuts on the inner side of the coil spring 3 at both edges of the main plate 15 and the tip of the rib 17, the coil spring 3 does not bend even when tension is applied to the electric wire 27. Accordingly, the electric wire 27 and the like can be held in a stable state at all times. On the other hand, since the coil spring 3 can move or extend in the axial direction, the held electric wire 27 or the like is hardly subjected to a load due to the spring force.
[0028]
Next, a second embodiment of the present invention will be described. First, FIG. 6A is a front view showing a spring holder 31 as a second embodiment of the present invention. Similar to the spring holder 1 of the first embodiment, the spring holder 31 of the second embodiment includes a coil spring 33 and a main body portion 35 that penetrates the coil spring 33 in the axial direction. It is enlarged to such an extent that the expansion and contraction of the coil spring 33 is not obstructed when the coil spring 33 is passed through.
[0029]
The difference is that the fixed portion 37 is parallel to the axial direction of the coil spring 33 and is inserted into a hole formed in the printed wiring board A so that the spring holder 31 stands as shown in FIG. Attaching to the board A, and accordingly, the holding part 39 maintains the posture of the spring holder 31 perpendicular to the printed wiring board A, and a holding plate 41 is provided in parallel with the main body part 35. In this figure, the lower side of the coil spring 33 is fixed to the main body 35 and the upper side is free.
[0030]
FIG. 6B shows the shape of a hole formed in the printed wiring board A for attaching the spring holder 31. The hole has a square shape, and a semicircular depression Q is formed on a pair of sides facing each other.
Details of the main body 35 are shown in FIG. 7A is a front view in which the coil spring 33 and the printed wiring board A are removed from FIG. 6, FIG. 7B is a left side view thereof, FIG. 7C is a right side view, and FIG. An upper plan view and FIG. 7 (e) are lower plan views. As shown in the figure, the main body 35 is provided with an upper rib 47 and a lower rib 49 on the main plate 43 in addition to the rib 45 corresponding to the rib 17 of the first embodiment. The rib 45 and the upper rib 47 are in contact with the inner periphery of the coil spring 33 and restrict the movement of the coil spring 33 other than in the axial direction.
[0031]
A through hole 51a is formed in the lower rib 49, and the coil spring 33 is fixed by passing the coil spring 33 therethrough. A similar through hole is also provided in the lower part of the rib 45 (hole 51b in this figure). By passing the coil spring 33 through both of the holes 51a and 51b, the relative position of the coil spring 33 with respect to the main body 35 is made constant. That is, the holes 51a and 51b correspond to the spring support portion of the present invention.
[0032]
Unlike the fixing portion 11 of the first embodiment, the fixing portion 37 is formed with bent portions 37 a and 37 b on both the left and right sides of the fixing plate P extending downward from the holding portion 39. The distance between the two tip portions 37c of the fixing portion 37 is slightly wider than one side of the hole shown in FIG. 6B, and the width of the tip portion 37c itself is slightly narrower than one side. When the fixing portion 37 is inserted into the hole shown in FIG. 6B, the bent portions 37a and 37b are compressed in a direction approaching each other, and after being pulled out from the back side of the printed wiring board A, the printed wiring board is formed at the tip end portion 39c. It comes into contact with A from below and cannot be removed. At this time, the fixing plate P is engaged with the hollow Q of the hole and cannot be rotated, and the spring holder 31 is firmly fixed to the printed circuit board A.
[0033]
The holding portion 39 is a portion that comes into contact with the printed wiring board A from above and cooperates with the fixing portion 37 to maintain the main body portion 35 perpendicular to the printed wiring board A.
The clamping plate 41 prevents the electric wire 27 from being easily detached when the electric wire 27 or the like is held between the coil spring 33 and the clamping plate 41, and a spring presser 53 is provided on the upper portion thereof. ing.
[0034]
Returning to FIG. The usage method of the spring holder 31 configured as described above is almost the same as that of the spring holder 1 except that the direction of the main body 35 is different. That is, the electric wire 27 and the optical fiber are held between the positions indicated by D and E in the drawing. According to this spring holder 31, like the spring holder 1, the coil spring 33 is not deformed when attached to the printed circuit board A, and even if a tension is applied to the retained electric wire 27 or the like, it is bent. Absent. And even if it holds many electric wires 27, since the upper side of the coil spring 33 is free, it can extend until it contacts the spring retainer 53. Further, since the spring holder 31 is fixed to the pudding and the wiring board A in a standing state, it can be applied to a narrow space where the spring holder 1 of the first embodiment cannot be attached.
[0035]
As mentioned above, although the spring holder 1 and the spring holder 31 were demonstrated as an Example of this invention, this invention is not limited to these Examples at all, and can be implemented in various aspects.
For example, in the spring holder 1, when the spring holder 1 is attached to the printed wiring board A by shifting the positions of the contact portions 19 a and 19 b and the contact portions 21 a and 21 b, a space opens below the coil spring 3. It may be. In this way, the flat cable can be held in this space.
[0036]
In addition, the coil spring is not wound at an equal pitch, like the coil spring 3 of the first embodiment or the coil spring 33 of the second embodiment, but a wire or the like is wound at an uneven pitch. It may be. In this way, the spring holder can hold a thin optical fiber or a thick cable.
[0037]
Further, the spring holders 1 and 31 may be fixed to the printed wiring board A by a method other than the above. An example of this is shown in FIG.
FIG. 8 shows a modified embodiment of the fixing portion 37 of the spring holder 31, and a pedestal 55 is provided instead of the bent portions 37 a, 37 b and the like. The pedestal 55 and the printed wiring board A are fixed with a double-sided adhesive tape 57. The pedestal 55 also serves as a holding portion 39 that maintains the main body portion 35 perpendicular to the printed wiring board A. In this way, the spring holder 31 can be installed without forming a hole as shown in FIG. 6B in the printed wiring board A. Further, the spring holder 31 shown in FIG. 8 may be fixed to the printed wiring board A with screws, rivets or the like instead of the double-sided adhesive tape 57.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a spring holder 1 according to a first embodiment of the present invention.
FIG. 2 is an explanatory view showing a main body 5 of a spring holder 1 according to a first embodiment.
FIG. 3 is a lower plan view of a main body portion 5 of a spring holder 1 according to a first embodiment and an explanatory view showing a shape of a hole formed in a plate.
FIG. 4 is an explanatory view showing a state in which a spring 3 is passed through a main body portion 5 of a spring holder 1 according to a first embodiment.
FIG. 5 is an explanatory view showing an example of use of the spring holder 1 of the first embodiment.
FIG. 6 is an explanatory view showing a spring holder 31 according to a second embodiment of the present invention.
FIG. 7 is an explanatory view showing a main body portion 5 of a spring holder 31 according to a second embodiment.
FIG. 8 is an explanatory view showing a spring holder 31 in which the fixing method to the printed wiring board A is changed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 31 ... Spring holder 3, 33 ... Coil spring 5, 35 ... Main-body part 7 ... Right end part 9 ... Left end part 11, 37 ... Fixed part 11a ... Tip 13 ... Gutter part 15, 43 ... Main board 17, 45 ... Rib 19a , 19b, 21a, 21b ... abutting portion 23 ... clip 25 ... projection 27, 27 '... electric wire 35 ... main body portion 39 ... holding portion 41 ... clamping plate 47 ... upper rib 49 ... lower rib 51a, 51b ... through hole

Claims (4)

In a spring holder comprising a coil spring and a fixing part for fixing the coil spring to a fixed member, and holding an electric wire, an optical fiber, etc. between the wound wire rods forming the coil spring,
A main body that is a rod-shaped member that penetrates the inside of the coil spring in the axial direction;
With
The fixing part is
A spring holder provided at at least one end of the main body. The spring holder according to claim 1, wherein
A holding portion that holds the main body portion substantially perpendicular to the fixed member when the main body portion is fixed to the fixed member by the fixing portion;
A spring holder characterized by further providing. The spring holder according to claim 2,
A spring support portion that makes the relative position between the one end on the holding portion side and the main body portion constant among both ends of the coil spring,
Further comprising
A spring holder characterized in that the coil spring is extendable in the direction of the other end. In the spring holder in any one of Claims 1-3,
A spring holder, wherein the coil spring is wound at a non-uniform pitch.

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