JP2967494B2 - Support mechanism for torsion spring and rotating member - Google Patents

Description

The present invention relates to a torsion spring that uses a torsion spring to rotate a rotating member in a relative direction to switch between a first operating position and a second operating position. The present invention relates to a support mechanism for a rotating member.

2. Description of the Related Art Conventionally, for example, in a fast-forward rewind mechanism of a tape player, when a fast-forward lever is operated, an intermediate gear meshes with a gear provided on one flywheel and one reel gear to feed a tape at a high speed in a forward direction. When the rewind lever is operated, the intermediate gear meshes with the gear provided on the other flyhole and the other reel gear to engage the tape at a high speed in the rewind direction. Or in the tape end detection mechanism,
An intermediate gear is provided using a torsion spring as switching means when the locking member is tilted between a first operating position for preventing rotation of the notch gear and a second operating position for allowing rotation of the notch gear. The supporting mechanism of the torsion spring and the turning member, which is operated by switching the turning member or the locking member in the relative direction to switch between the first operating position and the second operating position, is disclosed in, for example, JP-A-63-293760. Bulletin or Japanese Utility Model Showa 60-10
It is known in the publication 2737.

Then, the above-mentioned supporting mechanism is, for example, as shown in FIG. 7, in a state where the rotating member (21) is superimposed on the substrate (20),
The lower part of the support shaft (22) is penetrated through them, and the lower end is swaged to erect the support shaft (22) on the substrate (20), and the intermediate position between the substrate (20) and the support shaft (22). Flange (2
3) a rotatable member (21) is rotatably supported between the support member and the torsion spring (24).
Of the T-shaped support (26) which is bent at the end of the rotating member (21). A retaining ring (2
As shown in FIG. 8, a support shaft (22) is swaged at the lower end of the support shaft (22) on the substrate (20), and the support shaft (22) is turned upright. The moving member (21) is rotatably supported, and the restraining ring (28) is locked to the support shaft (22) in order to suppress the lifting of the rotating member (21), and further to the support shaft (22). The winding part (25) of the torsion spring (24) is loosely fitted, and both pieces are
The T-shaped support piece (26) bent at the end of 1) is pressed against both side faces, and a retaining ring (27) is attached to the upper end of the support shaft (22).
There is a configuration in which is locked.

Problems to be Solved by the Invention However, according to the structure shown in FIG. 7, the swaging operation must be performed on the substrate (20) in a state where the rotating member (21) is superimposed, so that the workability is reduced. It is difficult to replace the parts when it is not possible to perform the operation smoothly in the assembled state because the operation of the rotating member (21) is not good due to errors or slight deformations in the manufacturing of the rotating member (21). In addition, there are inconveniences such as the shape of the support shaft (22) being complicated, and according to the configuration shown in FIG.
After caulking the support shaft (22) on the substrate (20), the rotating member (21) can be supported on the support shaft (22), which is advantageous for workability. Not only is extra means required to lock the torsion shaft (22), but also the retaining ring (28) is hidden under the winding part (25) of the torsion spring (24). ) Is disengaged from the support shaft (22) when the lock is released during handling, which is insufficiently locked to the support shaft (22), or when the external force is applied to the retaining ring (28). In order to prevent the product from being shipped, often overlooking the presence of the retaining ring (28), and to prevent the pivoting member (21) from rising, Department (2
In the latter configuration, since the restraining ring (28) is interposed in the height direction in the latter configuration, there is a defect that the height dimension of the entire length is increased.

Means for Solving the Problems Therefore, in order to improve the above-described defect, the present application provides a rotating member that is superimposed on the substrate so as to be able to rotate horizontally on a support shaft that stands on the substrate, and an upper surface of the rotating member. In the supporting mechanism of the torsion spring and the rotating member configured to support the winding portion of the torsion spring to be superimposed and bias the elastic force in the rotating direction of the rotating member by the torsion spring,
On the support shaft, a plurality of locking pieces for locking in a locking groove provided on the upper portion of the support shaft are provided on the lower surface of a flange piece that abuts against the upper surface of the winding portion of the torsion spring provided in the center. An engaging member made of a synthetic resin having an edge abutting on the surface of the rotating member and vertically holding a receiving piece for maintaining the overlapping state of the rotating member with respect to the substrate is provided between the engaging groove and the engaging piece. In the above, the locking piece is provided in a free state so as to retain elasticity through an incision provided in the flange piece, and the receiving piece is provided with a torsion spring. There is a case where it is located inside the winding part of the above, and a case where it is located outside that.

In the state where the rotating member and the winding portion of the torsion spring are fitted on the support shaft standing on the substrate, the center portion of the flange piece is pushed from the upper end of the support shaft to form a plurality of locking pieces. Is locked in a locking groove provided in the upper part of the support shaft, and a locking member is attached to the support shaft.

In this mounting state, the lower edge of the receiving piece abuts on the upper surface of the rotating member to suppress its lifting.

When replacing the rotating member, pressing the flange piece upward with a tool or the like causes the locking piece to come off from the locking groove while being deformed by the elasticity of the locking piece. The pivot member can be removed from the support shaft together with the torsion spring.

The embodiment of the present invention will be described below in detail with reference to the drawings. As in the prior art, the support shaft (1) has its lower end portion erected on the substrate (3) by caulking (2). ), A rotating member (5) having a T-shaped support (4) bent at one end is rotatably fitted, and a winding part (7) of a torsion spring (6) is loosely fitted. The two pieces of the torsion spring (6) are pressed against the both side faces of the support piece (4).

In the present application, in the above-described configuration, the rotating member (5)
In order to suppress the floating of the torsion spring (6) and the winding part (7) of the torsion spring (6), respectively, the support shaft (1)
A locking member (8) made of a synthetic resin is attached to the base member. As is apparent from FIG. 3, the locking member (8) is diametrically opposed to the central portion, and has a distal end which is locked to a locking groove (9) provided at the upper end of the support shaft (1). Horizontal locking piece (10),
(10) is extended downward on the lower surface of the central portion of a flange piece (12) provided loosely through a substantially man-made incision (11) so as to retain elasticity. (10), (10) The receiving piece (13), (13) having an arcuate cross section facing in a direction orthogonal to (10) is integrally provided, and the locking member (8) thus configured is a support shaft. By pushing the upper end of (1) into the center of the incision (11) and locking the tip of a pair of locking pieces (10), (10) in the locking groove (9) of the support shaft (1) In this mounted state, the receiving pieces (13) and (13) are wound around the support shaft (1) and the torsion spring (6) in this mounted state. (7), the lower edge thereof abuts against the upper surface of the rotating member (5) to suppress its lifting, and to reduce the elasticity of the locking pieces (10) and (10). Yo Thus, manufacturing errors in the height direction are absorbed.

Therefore, in this state, the rotating member (5) is tilted in the relative direction by the urging force of the torsion spring (6), for example, when the fast-forward lever or the rewind lever is operated.

When the rotating member (5) is exchanged, when the flange piece (12) is pressed upward by a tool or the like in the mounting state shown in FIG. Since the locking member (8) is detached from the locking groove (9) while deforming, the locking member (8) can be removed from the support shaft (11), whereby the torsion spring (6) and the rotating member (5) can also be rotated. ) Can be removed.

FIGS. 4 to 6 show that the receiving pieces (15) for suppressing the lifting of the rotating member (5) are provided at four positions on the peripheral edge of the flange piece (16) and the winding portion ( 7) and four locking pieces (1) that are locked in the locking groove (9) of the support shaft (1) at the center of the flange piece (16).
7 shows another embodiment in which a locking member (8) is used, which is disposed at an angle of 90 ° through an incision (18).

In the case of this embodiment as well, the locking member (8) can be detached from the support shaft (1) as described above.

Advantageous Effects of the Invention As described above, according to the present application, by the attachment of the locking member, the rotating member is suppressed on the substrate by the lower edge of the receiving piece,
Maintaining a smooth horizontal rotation, the upper surface of the winding part of the torsion spring is restrained by the flange piece to prevent its floating, and the attachment and detachment of the locking member to the support shaft is easy, and There is an advantage that the rotation member can be replaced, and the overall height can be reduced.

Furthermore, according to the present application, after the support shaft is swaged on the substrate, the work can be performed on the production line, so that the workability is excellent. Has the advantage that the error of (1) can be absorbed by the elasticity of the locking piece.

[Brief description of the drawings]

1 is a plan view, FIG. 2 is a half sectional side view of a main part, and FIGS. 3A and 3B are a plan view and a side view of a locking member. FIGS. 4, 5, and 6 show (a) and (b) in FIGS. 1 and 2 in another embodiment.
FIGS. 7 and 8 corresponding to FIGS. 3 (a) and 3 (b), respectively.
The figure is a half sectional side view showing a conventional structure. In the figure, (1) is a support shaft, (3) is a substrate, (5) is a rotating member, (6) is a torsion spring, (7) is a winding portion,
(8) is a locking member, (9) is a locking groove, (10) and (17) are locking pieces, (11) and (18) are incised portions, (12) and (16) are flange pieces, (13) and (15) are receiving pieces.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16F 1/00-6/00 G11B 15/093 311 F16B 21/18

Claims (4)

(57) [Claims] 1. A torsion spring, comprising: a supporting member standing upright on a substrate; and a rotating member superposed horizontally on the substrate and a winding portion of a torsion spring superposed on the rotating member. In the supporting mechanism of the torsion spring and the rotating member configured to urge the elastic force in the rotating direction of the rotating member, a plurality of the plurality of engaging portions are engaged with the supporting shaft by engaging grooves provided on an upper portion of the supporting shaft. The lower piece abuts on the surface of the rotating member, the lower edge of which contacts the upper surface of the winding portion of the torsion spring, the locking piece of which is disposed at the center, and the rotating member overlaps the substrate. A supporting mechanism for supporting a torsion spring and a rotating member, wherein a locking member made of a synthetic resin formed by vertically suspending a holding piece to be held is attached by locking the locking groove and the locking piece. 2. A support mechanism for a torsion spring and a rotating member according to claim 1, wherein the locking portion is provided freely so as to retain elasticity through an incision provided in the flange piece. 3. The support mechanism of a torsion spring and a rotating member according to claim 1, wherein a plurality of receiving pieces are arranged so as to be located inside the winding portion of the torsion spring. 4. A supporting mechanism for supporting a torsion spring and a rotating member according to claim 1 or 2, wherein a plurality of receiving pieces are arranged outside the winding portion of the torsion spring.