JP3067836U - Quiet spring tool - Google Patents

Abstract

(57) [Summary] [Purpose] When pulling out a string, make it lightly and quietly. A mainspring reel wound around a silencing cord is rotatably held in a case, and a friction material for clamping a play brake engaged with the mainspring is a friction material.
And a push-up cam 7 is formed between the case 3 holding the friction material A5 and the push button 9 holding the friction material B6, and a spring 10 is provided on the push button 9. As a result, the play brake 4 is pressed between the friction material A5 and the friction material B6, and the friction between the play brake 4 and the friction material A5 is less than the friction force between the play brake 4 and the friction material A5. A structure in which the riding cam 7 is actuated by making the frictional force between the material B6 and the material B6 larger, so that the braking force of the play brake 4 can be reduced.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a wind-up mainspring reel device that is connected to a mobile phone or a portable accessory with a string, and is useful for preventing fall and theft.

[0002]

[Prior art]

 Conventionally, this type of mainspring reel device has a mainspring with a drawstring wound around it in a rotatable manner and a stopper and a stopper release button between the mainspring reel and the case. There is one that pulls out and stops it, and operates the stopper release button to rewind the string.

[0003]

[Problems to be solved by the invention]

 The mainspring reel device described in the related art has a problem that when the string is pulled out, the rubbing sound, the engaging sound of the stopper, the sound of the mainspring, etc. are bothersome and give an unpleasant impression.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and has as its object to reduce the generation of unpleasant sounds from stoppers and springs. It is intended to provide a silent spring reel device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the silent mainspring reel device according to the present invention, a mainspring reel 2 wound with a silencing string 1 is rotatably held in a case 3 and a play brake 4 engaged with the mainspring reel 2 is provided. The friction material A5 and the friction material B6 to be sandwiched are opposed to each other with a space therebetween, and a riding cam 7 is formed between the case 3 for holding the friction material A5 and the push button 9 for holding the friction material B6. By providing a spring 10 to the push button 9, the play brake 4 is pressed between the friction material A5 and the friction material B6, and the friction force between the play brake 4 and the friction material A5 is generated. The lifting cam 7 is actuated by making the frictional force between the play brake 4 and the friction material B6 greater than that of the play brake 4, and the braking force of the play brake 4 can be reduced. It is something.

The above-mentioned silent mainspring reel device is preferable in that the symmetrical balance mainspring 20 is installed in the mainspring reel 2 in the shape of a tom, in that it prevents sneaking movement and prevents rattling.

Further, the symmetrical balance spring 20 may be formed of a single piece, and a central portion thereof may be bent and held on the case shaft 30 of the case 3.

[0008] Furthermore, the rolling element 8 can be mounted on the riding cam 7 to make the sliding roll.

[0009]

[Action]

 When the silencer string 1 is pulled out from the case 3, the mainspring reel 2 rotates together with the play brake 4, but since it is sandwiched between the friction material A5 and the friction material B6, the friction coefficient is first increased. The friction material B6 is moved to actuate the riding cam 7, which pushes the gap between the friction material A5 and the friction material B6 to make the braking force of the play brake 4 very small. Very few. When the pulling of the muffling string 1 is stopped, the riding cam 7 moves in the opposite direction to shorten the gap between the friction material A5 and the friction material B6, so that the rotation of the play brake 4 is stopped, and Is in the stop state.

When the push button 9 integrated with the friction material B 6 is pressed with a finger or the like, the stop state is released, and the muffling string 1 is rewound on the mainspring reel 2.

[0011]

【Example】

 Embodiments will be described with reference to the drawings. In FIGS. 1 to 3, the silencing cord 1 is a sashimi thread of waxing, and has almost no rubbing sound and little friction. The mainspring reel 2 is made of a low-friction plastic material. The mainspring 2 is wound around the muffling string 1 and is rotatably held in a case 3 with its outer end supported. (Because of the outer end support, there is no danger of the cord being pinched between the case and the reel.)

A disc-shaped play brake 4 is provided so as to engage with the mainspring reel 2, and friction material A 5 and friction material B 6 are arranged to face each other with the play brake 4 interposed therebetween. For example, ABS resin and PS resin are used as the material of the play brake 4, the friction material A5, and the friction material B6, respectively, and the friction coefficient between them is static friction 0.5 (dynamic friction 0.2) and static friction, respectively. 0.6 (dynamic friction 0.1).

The friction material A5 is fixed to the inner surface of the case 3, and the friction material B6 is formed integrally with the push button 9. A lift cam 7 having a slope is formed between the case 3 holding the friction material A5 and the push button 9 holding the friction material B6, and a rolling element 8 is further provided in the drawing. Even if there is no moving body 8, the riding cam 7 operates.

A coil-shaped spring 10 is inserted into a cavity in the push button 9 and is held by a case shaft 30. The push button 9 can be moved along the case shaft 30, and a spring is provided. By the force of 10, the friction material B6, the play brake 4, and the friction material A5 are pressed against each other.

When the muffling string 1 is pulled out, the mainspring reel 2 and the play brake 4 rotate, and first, the friction material B6 having a large static friction rotates to actuate the riding cam 7, and the friction material A5 and the friction material A5 By reducing the braking force of the play brake 4 by widening the gap with B6, the pull-out force of the silencing cord is extremely reduced.

When the user stops pulling the muffling string 1, the play brake 4 is again braked and stopped. When the push button 9 is pressed against the spring 10, the brake is released and the muffling string 1 is symmetrically balanced. It is rewound with 20 forces.

It is desirable that the symmetrical balance spring 20 is formed as a single piece and has a rotationally symmetric tom-shaped shape. In FIG. 1, the central portion is bent and held on the case shaft 30 of the case 3. I have.

FIG. 4 shows an example of a symmetrical balance spring having another shape, wherein a and b are two-piece symmetrical balance springs, and cd, ef and f are one piece of two pieces. This is an example of the shape of a symmetrical balance spring. Cdef has rounded outer ends of the mainspring so that the roundness can slide, and has an effect of preventing damage to the mainspring due to excessive rotation.

If a rolling element such as a ball or a needle is interposed in the climbing cam 7 in the present invention, rolling frictional contact is provided, so that the cam operates more reliably.

[0020]

[Effect of the invention]

 Since the present invention is configured as described above, it has the following effects.

According to the silent spring device of the first aspect, the spring 2 on which the muffling string 1 is wound is held rotatably in the case 3, and the play break 4 engaged with the spring 2 is clamped. The frictional material A5 and the frictional material B6 are opposed to each other with a space therebetween, and a riding cam 7 is formed between the case 3 holding the frictional material A5 and the push button 9 holding the frictional material B6, By providing the push button 9 with a spring 10, the play brake 4 is pressed between the friction material A5 and the friction material B6, and the friction between the play brake 4 and the friction material A5 is increased. Since the frictional force between the play brake 4 and the friction material B6 is made larger than the force, the riding cam 7 is actuated so that the braking force of the play brake 4 can be reduced. So that the riding cam 7 works reliably. There is an advantage that the play brake 4 can be operated accurately by moving, and the silencer 1 can be quietly and lightly controlled.

According to the second aspect of the present invention, the balance is symmetrical, so that there is no slewing motion only during rotation, the rotation is smooth, and the sound of the mainspring portion is quieter, which is more effective.

According to the third aspect of the present invention, the symmetrical balance spring 20 is composed of a single piece, and its central portion is bent and held on the case shaft 30 of the case 3. There is an advantage that the configuration is simpler than that of making it symmetric.

According to the fourth aspect, since the rolling member 8 is provided inside the riding cam 7, there is an advantage that the sliding friction becomes rolling friction and the riding cam 7 operates with a light force.

The silent mainspring reel device of the present invention can be used with ease because the cord is smoothly put in and taken out and the sound is quiet as described above.

[Brief description of the drawings]

FIG. 1 shows a perspective view of the present invention.

FIG. 2 shows a rear view of FIG.

FIG. 3 is a sectional view taken along line II-II of FIG. 2;

FIG. 4 is a front view showing an embodiment of a symmetric balance spring;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Muffling string 2 ... Spring reel 20 ... Symmetric balance spring 3 ... Case 30 ... Case shaft 300 ... Outlet 4 ... Play brake 5 ... Friction material A 6 ... Friction material B 7 ... Riding cam 8 Rolling element 9 Push button 10 Spring

Claims (4)

[Utility model registration claims] 1. A mainspring reel 2 wound with a muffling string 1 is rotatably held in a case 3, and a friction material A5 and a friction material B6 sandwiching a play brake 4 engaged with the mainspring reel 2 are spaced from each other. A lift cam 7 is formed between the case 3 that holds the friction material A5 and the push button 9 that holds the friction material B6, and a spring 10 is provided on the push button 9. The play brake 4 is pressed between the friction material A5 and the friction material B6. The friction between the play brake 4 and the friction material B6 is smaller than the friction force between the play brake 4 and the friction material A5. The rider cam 7 is actuated by making the frictional force larger between them, so that the braking force of the play brake 4 can be reduced. 2. The silent mainspring reel device according to claim 1, wherein a symmetrical balance mainspring 20 is mounted on the mainspring reel 2. 3. The silent mainspring reel according to claim 2, wherein the symmetrical balance spring 20 is formed as a single piece, and a central portion thereof is bent and held on the case shaft 30 of the case 3. Utensils. 4. The silent mainspring reel device according to claim 1, wherein a rolling element 8 is provided inside the riding cam 7.