JPH0332469Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an inner wire attachment device for a brake operating lever used to operate a bicycle brake, for example.

(Prior art) As a conventional device of this type, for example,
Some of these are disclosed in Japanese Patent Publication No. 16788, Japanese Utility Model Publication No. 56-4556, and Japanese Patent Publication No. 61-3966.

In all of the conventional devices described above, a cylindrical nipple fixed to the end of an inner wire is rotatably fitted into a hole in a brake operating lever via a hollow cylindrical bush.

(Problems to be solved by the invention) As shown in Fig. 1a, a cylindrical nipple 2 is fixed to the end of an inner wire 1 for brake operation.
Usually, so-called zinc die-casting is used, which is formed by injecting molten zinc into split molds that sandwich the inner wire 1 therebetween.

However, the die-cast nipple 2 using a split mold often has burrs 3 on the outer circumferential surface of its body, as shown in FIG. 1a.

The nipple 2 with this burr 3 is difficult to enter into the bush, and even if it does enter the bush, there is a risk of damaging the inner surface of the bush.
Further, in order to eliminate these problems, there is a problem in that the number of processing steps increases accordingly in order to remove the burr 3.

(Means for Solving the Problems) In order to solve the above-mentioned problems, in the present invention, a hollow cylindrical body into which a cylindrical nipple fixed to the end of the inner wire can be inserted loosely is inserted along its axis. A bag-shaped bushing is formed from a synthetic resin with excellent wear resistance, and has an inner wire insertion hole in its body, and a notch opening is formed by notching 1/2 or less. Inserting the inner wire and pushing the cylindrical nipple through the notch opening of the bag-shaped bushing is fitted into a brake operating lever having a bushing insertion hole that communicates with a vertical groove and a side groove for inserting the inner wire. Constitutes the inner wire attachment device for the brake operating lever.

(Function) As mentioned above, in the present invention, the cylindrical nipple fixed to the end of the inner wire is loosely fitted into the bag-shaped bush cut approximately in half, so even if the nipple has burrs, It can be easily inserted into the bag-like bushing, and since there is a play space between the bag-like bush and the nipple, there is less risk of damaging the inner surface of the bush unlike in the conventional case.

Further, according to the present invention, there is no need for an extra step of removing burrs formed on the nipple, which facilitates manufacturing and reduces costs.

(Example) An example of the present invention will be described below with reference to the drawings. In the figure, 1 is an inner wire, 2 is a cylindrical nipple fixed to the end of the inner wire 1, 3 is a burr formed on the body of the nipple 2, 4 is a brake operating lever, and 5 is its fulcrum hole.

In this embodiment, as shown in FIG. 1b,
A hollow cylindrical body into which the cylindrical nipple 2 can be fitted loosely is notched along its axis to form a notch opening 6 in less than 1/2 of the hollow cylindrical body, and a notch opening 6 is formed in the body thereof. As shown in the figure, a bag-shaped bushing 8 provided with an inner wire insertion hole 7 is made of synthetic resin such as Teflon, which has excellent wear resistance, and the inner wire 1 is inserted into the hole 7 of this bag-shaped bush 8. At the same time, the cylindrical nipple 2 is inserted through the notch opening 6 of the bag-shaped bushing 8, and as shown in FIG. 1c and FIG. It is fitted into the brake operating lever 4 which has a communicating bushing fitting hole 11.

Note that when the nipple 2 is pushed into the bag-like bush 8, an adhesive may be applied to the outer peripheral surface of the nipple 2.

Since the device of the present invention is configured as described above, when the operating lever 4 is operated and the lever 4 is rotated about its fulcrum hole 5, even if a load is applied to the inner wire 1, the bag-shaped bush 8 The outer peripheral surface of the bushing fitting hole 11 slides on the front part of the inner peripheral surface of the bushing insertion hole 11.
In this case, since the bag-shaped bush 8 and the nipple 2 rotate together, local bending does not occur at the connecting portion between the inner wire 1 and the nipple 2.
Therefore, the device of the present invention can reduce breakage of the inner wire 1 even if the brake operating lever 4 is repeatedly operated, thereby solving one of the causes of brake accidents.

(Effects of the invention) As described above, in the present invention, the cylindrical nipple 2 fixed to the end of the inner wire 1 is loosely fitted into the bag-shaped bushing 8 cut approximately in half. Even if there is a burr 3,
It can be easily inserted into the bag-shaped bush 8, and since there is a play space between the bag-shaped bush 8 and the nipple 2, there is less risk of damaging the inner surface of the bush unlike in the conventional case. Furthermore, as described above, since the inner wire 1 of the device of the present invention is less likely to break, the present invention has the effect of improving the safety and durability of the brake operating device.

Further, according to the present invention, there is no need for an extra step of removing the burr 3 formed on the nipple 2, which facilitates manufacturing and reduces costs.

[Brief explanation of the drawing]

Figure 1 is an exploded view of the device of the present invention, figure a is a perspective view of the inner wire and nipple, figure b is a perspective view of the bag-shaped bushing, figure c is a perspective view of the brake operating lever, and figure 2 is its perspective view. FIG. 3 is a partial side view of the brake operating lever partially shown in cross section in an assembled state. 1...Inner wire, 2...Nipple, 3...
...Flash, 4... Brake operating lever, 5... Fulcrum hole, 6... Notch opening, 7... Inner wire insertion hole, 8... Bag-shaped bushing, 9... Vertical groove, 10
... Side groove for inserting inner wire, 11 ... Button insertion hole.

Claims (1)

[Scope of utility model registration request] A hollow cylindrical body into which a cylindrical nipple 2 fixed to the end of the inner wire 1 can be inserted loosely is notched along its axis to form a notch opening 6, and the inner wire is inserted into the body of the hollow cylinder. A bag-like bushing 8 provided with an insertion hole 7 is formed of a synthetic resin with excellent wear resistance, and the inner wire 1 is inserted through the hole 7 of the bag-like bushing 8, and the notch opening of the bag-like bushing 8 is inserted through the hole 7 of the bag-like bushing 8. 6, the cylindrical nipple 2 is inserted into a brake operating lever 4 having a bushing insertion hole 11 that communicates with a vertical groove 9 and a side groove 10 for inserting an inner wire. Inner wire attachment device.