JP2955744B2 - Dynamo for bicycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamo for a bicycle which is mounted on a fork of a bicycle so as to obtain electric power for a lamp from rotation of a tire. A feature of the present invention is that the mounting structure for connecting a lead wire is simplified to reduce the manufacturing cost.

[0002]

2. Description of the Related Art In a conventional dynamo, a flat rectangular tube-shaped terminal piece insertion portion having a rectangular cross section is integrally hung at one corner of a plastic bottom plate, and a tip portion is hooked on the upper surface of the bottom plate. While fixing the base end of the leaf spring terminal piece bent into contact with the back surface of the magnetic pole plate fitted in the case, the hook-shaped tip portion is inserted through the insertion portion,

When a lead wire is connected to a terminal piece, the tip of the terminal piece that is exposed outside the insertion portion is pushed in against the elasticity of the leaf spring, and the tip portion is inserted into the side surface of the rectangular insertion portion. After the bare wire at the end of the lead wire is passed through this insertion hole while matching the insertion hole provided in common with The bare wire portion is held at the insertion position between the edge of the hole and the insertion holes on the side of the insertion portion located before and after the hole, and the terminal piece and the lead wire are connected.

[0004]

In a conventional dynamo in which a lead wire is connected to a terminal piece as described above, a leaf spring terminal piece is manufactured separately from the magnetic pole plate, so that the number of parts increases. In addition, there is a drawback in that a structure for fixing the base end of the terminal piece to a predetermined position on the bottom plate of the dynamo case needs to be added and the number of assembling steps is required.

There is also a technical problem that it is not guaranteed that the contact between the leaf spring terminal piece fixed at a predetermined position and the pole plate portion of the dynamo is complete even after the lead wires are connected. From the above, it is possible to simplify the mounting structure when connecting the lead wires to the terminal pieces, to facilitate the assembling, to reduce the manufacturing cost, and to ensure the electrical connection. However, this type of bicycle dynamo has been a problem to be solved.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a plastic bottom plate provided with a notch groove in a U-shape so that a base end portion is continuous with the bottom plate and a front end portion is elastically directed toward a body. A simple lead wire mounting structure is provided by integrally forming an elastic piece for mounting a lead wire that can be bent, and penetrating the insertion hole of the terminal piece of dynamo at the tip of this elastic piece. Another object of the present invention is to provide a dynamo for a bicycle in which a lead wire can be connected by using bending of an elastic piece integrally formed on a bottom plate while a terminal piece is kept fixed.

The dynamo according to the present invention has a terminal piece integrally extended from a pole plate of the dynamo and bent downward so that the lead wire can be connected without bending the terminal piece. Thus, it is possible to provide a bicycle dynamo in which the use of a terminal piece separate from the dynamo body is omitted, the number of parts is reduced, and the assembly is made easier.

Further, in the dynamo of the present invention, an insertion hole is provided on one side of the elastic piece by providing a groove for inserting a lead wire which crosses the insertion hole of the terminal piece in a cross shape on the back surface of the distal end portion of the elastic piece. In addition, the lead wire can be firmly connected and held, and a more advantageous manufacturing can be performed without the die structure for forming the through hole from the side. The present invention has solved the above-mentioned problems as described above.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. A dynamo A shown as an example of the most preferred embodiment of the present invention has a magnetic pole plate 3, a coil 4, and a rotating magnet 5 built in between a plastic case main body 1 and a bottom plate 2 fitted to the bottom surface thereof. A rotor 6 is rotatably provided on the top of the case body 1 to be driven and rotated in contact with the tire, and has a mounting plate 7 rotatably mounted on the case body 1 on the side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 3, a plastic bottom plate 2 is provided with a U-shaped notch 8 extending from one side to the center of the bottom surface in parallel with the center line, thereby forming a base end 9 on the left hand in the figure.
And a substantially rectangular elastic piece 1 which is made continuous with the bottom plate 2
0 is integrally molded.

An elastic piece 10 has a vertical insertion hole 12 penetrating inside and outside of the body at a distal end portion 11 which is positioned on the right hand in the drawing and hangs down.
And a terminal piece 13 integrally extended from the magnetic pole plate 3 and bent downward is inserted therethrough. By pressing the distal end portion 11 against the elasticity of the elastic piece 10, the case body 1 Can be elastically bent toward the body from the back side. In addition, an insertion hole 1 is provided on the back surface of the tip 11.
A shallow fitting groove 14 intersecting in a cross shape with the center 2 is provided.

As shown in FIG. 1, when a user holds a lead wire 16 having a bare wire portion 15 at the tip and pushes the tip portion 11 of the elastic piece 10 with the other fingertip using the elasticity of the plastic material itself. The fitting groove 14 of the distal end portion 11 is
3 is inserted into the insertion hole 17 provided at the end, and after the bare wire portion 15 is inserted as shown in FIG. 3 and the fingertip pressed is released, as shown in FIG. The wire portion 15 is clamped in the insertion hole 17 by the restoring force of the elastic piece 10 while being restrained in the fitting groove 14, and firmly maintains the connection state between the terminal piece 13 and the lead wire 16.

[0012]

As described above, according to the dynamo of the present invention, it is possible to connect a lead wire in a state where a terminal piece is placed at a fixed position without bending. And since the elastic piece which bends when connecting the lead wire is formed integrally with the bottom plate, it is possible to manufacture a separate leaf spring and to save the trouble of mounting it.
The dynamo can be easily assembled and cost can be reduced.

Further, according to the present invention, in which the lead wire can be connected without bending the terminal piece, it is possible to extend the terminal piece directly from the magnetic pole plate. The assembly is easier and the connection reliability of the electric circuit is improved. The present invention has excellent effects as described above.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the embodiment.

FIG. 3 is a partially cutaway plan view of the embodiment.

[Explanation of symbols]

 A Dynamo 1 Case body 2 Bottom plate 3 Magnetic pole plate 4 Coil 5 Rotating magnet 6 Rotor 7 Mounting plate 8 Cut groove 9 Base end 10 Elastic piece 11 Tip 12 Insertion hole 13 Terminal strip 14 Fitting groove 15 Bare wire part 16 Lead wire 17 Insertion hole

Claims (3)

(57) [Claims] 1. A lead in which a cutout groove is provided in a U-shape in a plastic bottom plate so that a base end portion can be connected to the bottom plate and a front end portion can be elastically bent toward a body. A dynamo for bicycles in which an elastic piece for wire attachment is integrally formed, and a through-hole for a terminal piece of a dynamo is penetrated at the tip of the elastic piece. 2. The dynamo for a bicycle according to claim 1, wherein the terminal piece is a terminal piece integrally extended from a pole plate of the dynamo and bent downward. 3. The bicycle dynamo according to claim 1, wherein a groove for inserting a lead wire is provided on the back surface of the distal end portion of the elastic piece so as to cross the insertion hole in a cross shape.