JPH0141746Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to a spiral spring storage case that houses a spiral spring that is wound and unwound in response to rotation of a rotating shaft.

(Prior art) As a conventional device of this type,
There is one with the number. In this device, as shown in FIG. 1, only one side of the spiral spring 40 is supported by the case 41, and the inner peripheral end 40a of the spiral spring 40 is locked to the slit 42a of the rotating shaft 42. spiral spring 4
The outer peripheral end 40b of 0 was locked to the case 41.

The spiral spring 40 is wound and unwound by rotation of the rotating shaft 42. Therefore, a gap is provided between the spiral spring 40 and the rotating shaft 42. However, the spiral spring 4
0 is the inner peripheral end and the slit 42a of the rotating shaft 42
Since a clearance is unavoidable between the spiral spring 40 and the parallelism of the spiral spring 40 itself with respect to the rotation axis 42, it is difficult to ensure the parallelism of the spiral spring 40 itself with respect to the rotation axis 42. It protrudes toward the rotating shaft 42.

Further, the spiral spring 40 is normally assembled into the slit 42a of the rotating shaft 42 with an initial load. Therefore, as illustrated in Figure 2,
Before fixing the case 41 to the base member 43, the spiral spring 40 is housed in the case 41, and after the outer peripheral end 40b of the spiral spring 40 is locked to the case 41, the spiral spring 40 is fixed to the base member 43.
The inner peripheral end 40a of the rotating shaft 42 is shallowly engaged with the slit 42a of the rotating shaft 42, and then the case 41 and the rotating shaft 4
Hold either one of 2, and either the other 42, 41
The spiral spring 40 was rotated to apply an initial load to the spiral spring 40, and then the inner circumferential end 40a of the spiral spring 40 was deeply engaged with the slit 42a of the rotating shaft 42, and the case 41 was fixed to the base member 43. . Therefore, while the case 41 or the rotating shaft 42 is rotating, a portion of the spiral spring 40 may protrude. There was a problem in that the spiral spring 40 jumped out of the case 41, making it difficult to assemble.

Therefore, the technical problem of the present invention is to support the outer periphery and both side surfaces of the spiral spring by a case to solve the above-mentioned problems.

[Structure of the idea]

(Means for Solving the Problems) The measures taken to solve the above problems include a case body having a bottom wall that supports one side of the spiral spring and an outer peripheral wall that supports the outer periphery of the spiral spring; a plate-shaped lid that supports the other side; a pair of recesses provided in the outer peripheral wall; a convex portion provided at both ends of the lid and capable of engaging with the recess; It has a protrusion that is provided to hang down relative to the protrusion, and a hole that is formed in the convex part and that can be engaged with the protrusion.

(Function) As a result, since both sides of the spiral spring are supported by the case, the spiral spring is prevented from protruding to the side during winding. In particular, since it is housed in the case in advance, the spiral spring is prevented from protruding even when an initial load is applied during assembly.

(Example) A typical example for embodying the means of this invention will be described below. The following explanation will be based on a wind regulator mechanism, particularly a wire type wind regulator mechanism, but it goes without saying that the present invention can also be used, for example, in a seatbelt winding mechanism.

The general structure of a window regulator that raises and lowers a door glass using a wire is shown in FIG. 1 is the door, 2 is the window glass, 3
is the drive device for the wind regulator. 4 is fixed to the door inner plate with bolts, etc., and the drive device 3
5 is a guide which guides the raising and lowering of the holder 6 which engages with a bracket 7 fixed to the lower end of the window glass 2. 8 and 9 are mounting plates for the door 1 attached to the upper and lower ends of the guide 5;
Reference numerals 0 and 11 indicate pulleys pivotally connected to the mounting plates 8 and 9, respectively, for guiding the wire 13.

The drive device 3 has a handle shaft 14 rotatably disposed on the base member 4, as shown in FIG. A handle (not shown) is attached to one end of the handle shaft 14, and the other end is connected to the drum 15 via a known friction brake mechanism (not shown). A thread-like groove is formed on the outer periphery of the drum 15, and both ends 13 of the wire are wound along this groove. A drum case 18 is fixed to the base 4, and a shaft portion 14b of the drum 15 is rotatably supported on the drum case 18. Case 20 fixed to mounting portion 9 of drum case 18 with claws 25
A spiral spring 30, which will be described later, is housed inside, and the inner circumferential end 26 of this spiral spring 30 is locked to the slit 14a of the shaft portion 14b of the drum 15, and its biasing force causes the window glass to rise when the window glass is raised. The steering force is reduced.

When the handle shaft 14 is rotated, the drum 1
5 is rotated and the wire 13 is moved. Therefore, the window glass 2 is raised and lowered, and the window is opened and closed.

Next, the case 20, which is the main part of the present invention, will be explained. As shown in FIG. 5, the case 20 includes a case body 20a and a lid body 3 made of synthetic resin.
It consists of 3. The case body 20a has a cylindrical shape with a bottom wall, and substantially accommodates the spiral spring 30. One side of the spiral spring 30 is formed by the bottom wall of the case body 20a, and the outer periphery of the spiral spring 30 is formed by the peripheral wall 29, respectively. A pair of left and right claws 25, 25 are provided on the peripheral wall 29, and the claws 2
5 and 25 fix the case body 20a to the mounting portion 19. Further, a pair of left and right locking portions 34 and 35 are provided on the peripheral wall 29, and a mounting hole is formed between the locking portions 34 and 35 and the peripheral wall 29. Further, a locking piece 28 is provided on the case body 20a, and the outer peripheral end 27 of the spiral spring 30 is locked.

On the other hand, as shown in FIG. 6, the lid body 33 is
It has a plate shape, and has foot portions 34A and 34A on both ends thereof, respectively.
35A is provided. Each leg 34A, 35A
However, the lid body 33 is attached to the case body 20a by being inserted and locked into the respective locking portions 34 and 35 of the case body 20a. The other side of the spiral spring 30 is supported. A hole 33a is provided in the center of the lid body 33, and the shaft portion 14 of the drum 15 is provided with a hole 33a.
b can be inserted.

When inserting both legs 34A, 35A of the lid body 33 into the mounting holes of the case body 20a, step 7a
As shown in Figures 7b and 7c, first, with the lid 33 tilted, one leg 34 of the
A is inserted into one attachment part 34, and then the lid body 33 is bent downward to be elastically deformed, and the other leg part 35A is inserted into the other attachment part 35. That is, both legs 34A and 35A of the lid 33 are connected to the mounting portion 3, respectively.
4, 35 (Fig. 7c). In addition, since the hole 33a is provided in the center of the lid 33, the lid 33 can be bent even more easily.

As a result, both sides of the spiral spring 30 housed in the case 20 are supported by the case 20, and the spiral spring 30 is reliably prevented from protruding when it is wound by the rotation of the drum 15. Ru.

In the modified embodiments shown in FIGS. 8a, 8b, 8c, 9, and 10, protrusions 30C, 35C facing toward the peripheral wall 29 are provided on the locking portions 34, 35 of the case body 20a. ing. On the other hand, lid body 3
Holes 34B, 35 are provided in each foot portion 34A, 35A of No. 3.
B is formed, and the foot portions 34A and 35A are the locking portions 3.
4 and 35, the protrusions 34C and 35C are engaged with the holes 34B and 35B. Therefore, even if a strong load is applied to the lid body 33, the protrusion 34
Since C and 35C are engaged with holes 34B and 35B, cover plate 33 does not fall off from case body 20a. Incidentally, the lid 33 is assembled to the case body 20a by elastically deforming the lid 33, as in the previous embodiment.

In another embodiment shown in FIGS. 11 and 12, the case body 20a has a pair of protrusions 34F, 35F erected in the axial direction on its peripheral wall 29, and the upper ends of the protrusions 34F, 35F are on both sides. Leg portions 34E and 35E are formed extending in the direction around the axis. On the other hand, the foot portions 34A and 35A of the lid body 33 are provided with grooves 34b and 35b facing in the radial direction. Grooves 34b of foot portions 34A and 35A of lid body 33,
By engaging 35b with the protrusions 34F and 35F, the lid 33 is fixed to the case body 20a.

While housed in the case 20, the inner circumferential end 26 of the spiral spring 30 is shallowly engaged with the slit 14a of the drum 15, as shown in FIG. Wind. After this, attach the case 20 to the claw 25,
By fixing the spring 30 to the mounting portion 25, the spring 30 is locked to the slit 14a of the drum 15 with an initial load. Since both sides of the spring 30 are supported by the case 20, the spring 30 does not protrude, and the initial load can be easily set.

[Effect of idea]

Since it has a plate shape, the lid can be easily pressed and bent by elastic deformation. Therefore, there is an advantage that both the legs, that is, the convex portions can be easily inserted and assembled into both the locking portions, that is, the recesses of the outer peripheral wall of the case body.

Furthermore, the spiral spring is housed in the case in advance with both sides of the spiral spring supported. Therefore, even if the case is accidentally dropped during assembly, the spring will not fly out from the case, and there is no risk of injury to the operator.

In addition, the lid is latched to the case with its deflection restricted in the installed state by engagement between the protrusion provided in the recess and the hole provided in the protrusion so as to hang down relative to the recess. The lid body will not come off from the case due to the spiral spring protruding or falling when the spiral spring is wound.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing a conventional case, FIG. 3 is a front view showing a wire-type wind regulator mechanism, and FIG. 4 is a front view showing a drive device.
Fig. 5 is a perspective view showing the case according to the present invention;
The figure is a perspective view showing the lid, Figures 7a, 7b, and 7c are sectional views showing the procedure for assembling the case, and Figures 8a, 8b, and 8c are assembly of modified embodiments. A sectional view showing the procedure, Fig. 9 is - of Fig. 8c.
10 is a bottom view taken from the direction of arrow c in FIG. 8c, FIG. 11 is a perspective view of another embodiment, and FIG. 12 is a perspective view of the lid;
and FIG. 13 are cross-sectional views showing the state in which the case is attached. 20...Case, 20a...Case body, 33
... Lid body, 34A, 35A ... Foot part (convex part), 3
4, 35...Locking portion (recess).

Claims (1)

[Scope of utility model registration request] a case body having a bottom wall supporting one side of the spiral spring and an outer peripheral wall supporting the outer periphery; a plate-shaped lid body supporting the other side of the spiral spring; a concave portion, a convex portion provided at both ends of the lid and capable of engaging with the concave portion, a protrusion provided in each of the concave portions so as to hang down with respect to the concave portion, and a protrusion formed in the convex portion and engaged with the concave portion; and an engageable hole, and the lid body is attached to the case body by bending the lid body and engaging the concave portion and the convex portion and the protrusion and the hole. Storage case for spiral springs.