JPH0144976Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electric heater whose main body includes a quartz tube heater or the like and has an oscillating structure.

Structure of the conventional example and its problems A method of electrically connecting the main body case part of the conventional electric heater having a swinging structure and the stand part supporting it is as shown in FIGS. 1 and 2.
A cutout is provided at the lower end of the back of the main body 101 and the lower end of the back of the stand 102, and the main body 101 and the stand 102 are connected by a relay lead wire 104 with protective bushings 103, 103' attached to the cutouts. At this time, the relay lead wire 104 forms a curved portion 104a with a large radius of curvature. Here, when the main body 101 is swung left and right, the relay lead wire becomes slightly stretched as the distance between the protective bushings 103 and 103' increases. As shown by the two-dot chain line in FIG. 2, the relay lead wire 104 protrudes from the main body 101 and the stand 102 at right angles to the mounting surface, so it is strongly connected at two points near the protective bushings 103 and 103'. Bending (R designated part)
You will be forced to do so. That is, relay lead wire 1
04, it is curved when the distance between the protective bushing 103 and the protective bushing 103' is the shortest, and becomes close to a straight line when this distance becomes large. On the other hand, protective bushing 10
The relay lead wire 104 near 3,103' is
When the distance between the protective bushings 103, 103' is the shortest, it is close to a straight line, and when this distance becomes large, the distance between the protective bushings 103, 103'
Stress concentrates near the area, and the bending occurs with a small radius of curvature. Therefore, due to the swinging motion of the main body 101, the bent portion of the relay lead wire 104 moves, and the radius of curvature also changes significantly, so that the internal core wire repeats a large amount over the entire relay lead wire 104. It will be subjected to bending force.

For this reason, the relay lead wire 104 must be a lead wire with excellent bending resistance.
It has become expensive.

In addition, if the relay lead wire 104 is configured to be long in order to reduce the bending ratio of the relay lead wire 104, when the relative positional relationship of the protective bushings 103 and 103' is closest, it will protrude greatly to the rear of the product, causing the product to be attached to a wall surface, etc. When installed together, there are problems such as this relay lead wire rubbing against the wall and interfering with the swinging movement.

Purpose of the invention The present invention aims to eliminate these conventional drawbacks.It reduces the bending rate of the relay lead wire when it swings, without protruding significantly toward the rear of the main body, and creates a lead wire with excellent bending resistance. The objective is to provide a structure that satisfies durability without using.

Structure of the invention The electric heater of the invention includes a main body that is pivotally supported on the upper part of a stand so that it can swing from side to side, a lower bushing that is attached to a notch provided on the back side of the stand, and a notch provided on the back side of the main body. and an upper bushing attached to the notch, the lead-out portion of the relay lead wire is protected by the upper bushing and the lower bushing, and the lower bushing protrudes obliquely upward from the back surface of the stand or is connected to the upper bushing. The bushing has a structure that projects diagonally downward from the back surface of the main body.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIGS. 3 and 4. In the figure, 1 is a main body case of an electric heater in the form of a vertically elongated box with an open front, 2 is a vertical quartz tube heater held from both sides by an upper reflective support plate 3 and a lower reflective support plate 4, and 5 is a vertical quartz tube heater. is a parabolic reflector having a focal point at the center of the quartz tube heater 2, and is provided so that an air flow path is formed between it and the main body case 1. 6 is a guard that prevents large foreign objects from entering from the front; 7 is a power switch attached to the top of the main body case 1; 8 is a blower fan motor attached to the lower back of the main body case 1; Air sucked in through the suction port 9 of the support plate 4 passes between the main body case 1 and the parabolic reflecting plate 5, and is discharged from the air outlet 10 of the upper reflective support plate 3. Reference numeral 11 denotes a rotation center shaft attached to the bottom plate 12 of the main body case 1, which is loosely engaged with a bearing portion 14 at the center of the stand 13, and supports the main body case 1 with respect to the stand 13 so as to be rotatable. 15 is a swing drive motor, and stand 1
3, a crank 16 attached to the main shaft of the swing drive motor 15, a boss 17 attached to the bottom plate 12, and the crank 16, and the boss 1
A crank mechanism is constituted by a rod 18 that connects the rods 7 with a slide. 19 is a base that can be attached to and detached from the stand 13, increasing the stability of the product. Reference numeral 20 denotes a relay lead wire for electrically connecting with the power switch 7 and the fan motor 8 for blowing air inside the main body case 1, and the swing drive motor 15 inside the stand 13.

A bushing A 21 is inserted into a notch provided at the lower end of the back surface of the main body case 1, and protects the relay lead wire 20 by pulling it out perpendicularly to the mounting surface.
22 is inserted into a notch provided at the lower end of the back of the stand 13, and the relay lead wire 20 is inserted into the bushing A.
This is a bushing B that is guided diagonally upward from the mounting surface in the direction of 21 for protection.

In the above configuration, the main body case 1 is the stand 13
When the bushing A 21 and the bushing B 22 are vertically positioned in the front direction, as shown in FIG.
is formed.

When the power switch 7 is turned on, the vertical quartz tube heater 2 is energized, and due to the rotational movement of the oscillating drive motor 15, the crank mechanism
The main body case 1 has a rotation center axis 1 relative to the stand 13.
Perform a swinging motion from side to side centering on point 1. At this time, as shown in Fig. 4, the distance between the bushing A21 attached to the main body case 1 and the bushing B22 attached to the stand 13 increases, but since the tip of the bushing B22 protrudes diagonally upward, the relay The curved portion 20a of the lead wire 20 only has a larger radius of curvature, and the change in curvature is small. That is, when the head is oscillated, the distance between the protective bushings A21 and B22 changes, but the relay lead wire 20 only changes the curvature of the intermediate upper curved portion 20a, and its bent position also changes. Therefore, the bending force applied to the internal core wire of the relay lead wire 20 is also light.

In addition, since the lower end of the relay lead wire 20 is guided diagonally upward by the bushing B22, the amount of horizontal protrusion of the relay lead wire 20 is reduced compared to the conventional installation direction in which the lead wire 20 is led out in the horizontal direction. This can prevent the product from protruding to the rear.

Effects of the invention As described above, according to the invention, one of the protective bushings of the relay lead wires provided on each of the main body case and the stand is shaped to be guided obliquely to the mounting surface and in the direction of the other bushing. As a result, the bending rate of the relay lead wire is reduced in response to changes in the relative positional relationship between the main body case and the stand, and there is no need to use materials with excellent bending resistance. The rearward protrusion of the product can also be suppressed.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the electric heater in the conventional example, Fig. 2 is a perspective view of essential parts from the back side, Fig. 3 is a sectional view of the electric heater in an embodiment of the present invention, and Fig. 4 is a perspective view from the back side of the electric heater. FIG. 3 is a perspective view of main parts. 1...Body case, 13...Stand, 20...
. . . Relay lead wire, 21 . . . Bushing A (upper bushing), 22 . . . Bushing B (lower bushing).

Claims (1)

[Scope of utility model registration request] A main body pivotably supported on the upper part of the stand so as to be able to swing left and right, a relay lead wire connecting the stand and the main body, a lower bushing attached to a notch provided on the back side of the stand, and a lower bushing of the main body. and an upper bushing attached to a notch provided on the back surface, the lead-out portion of the relay lead wire is protected by the upper bushing and the lower bushing, and the lower bushing projects obliquely upward from the back surface of the stand. Alternatively, the upper bushing is an electric heater that protrudes diagonally downward from the back surface of the main body.