JP2944299B2 - Telescopic telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telescopic telephone and, more particularly, to an improvement of a telescopic part connecting structure.

[0002]

2. Description of the Related Art FIGS. 4 (a) and 4 (b) show two cross-sectional structures of a telescopic part connecting structure of a conventional telescopic telephone. FIG. 2A is a cross-sectional view showing an engagement state of a guide groove 1 c provided in the main body case 1 and an engagement piece 4 a provided in the back cover 4 of the movable case 3. The guide grooves 1c are provided on both sides of the sliding contact surface of the main body case 1. Correspondingly, the engaging pieces 4a provided on the back cover 4 are engaged, and the engaging pieces 4a move along the guide grooves 1c. As a result, the movable case 3 is slid with respect to the main body case 1 to shorten and extend the telephone. In this case, the positions of the guide groove 1c and the engagement piece 4a are in a positional relationship such that, when they are engaged with each other, they do not exert a reaction force on each other and do not deform. The width of the guide groove 1c is equal to the engagement piece 4a.
When the engaging piece 4a is pressed against the guide groove 1c in assembling the telephone, the engaging piece 4a is bent inward while the guide groove 1c is bent.
c.

FIG. 4B is a cross-sectional view showing an engagement state between an engagement piece 6a provided on the body case 1 side and a guide groove 4d provided on the back cover 4 of the movable case 3. Body case 1
Hook 6 fitted inside a pair of square holes 1d
The engaging piece 6a is protruded, and the engaging piece 6a is engaged with a vertically long guide groove 4d provided on the back cover 4 of the movable case 3, and the engaging piece 6a is moved along the guide groove 4d. In this case, the position of the guide groove 4d and the position of the engagement piece 6a are in a positional relationship such that when they are engaged, they do not exert a reaction force on each other and do not deform. Since the width of the guide groove 4d is larger than the thickness of the engagement piece 6a, when assembling the telephone, when the engagement piece 6a is pressed in accordance with the guide groove 4d, each of the engagement pieces 6a is moved outward. Guide groove 4 while bending
d.

[0004]

In such a conventional telescopic telephone, the guide groove 1c and the engaging piece 4a, and the engaging piece 6a and the guide groove 4d are used to connect the main body case 1 and the movable case 3. Although they are engaged with each other, the holding force of the connection between them depends only on the elasticity of each of the engagement pieces 4a and 6a. Therefore, it is impossible to drop the telephone or extend the movable case. When an excessive force is applied, an excessive force is applied to the engagement piece, the engagement with the guide groove is released, and the movable case may be dropped from the main body case. In addition, when the width of the guide groove is increased to facilitate engagement with the engagement piece, a lateral gap is formed between the engagement piece and the guide groove, so that there is a play when the movable case is expanded and contracted. There is a problem that sticking occurs. SUMMARY OF THE INVENTION It is an object of the present invention to provide a telescopic telephone that prevents a movable case from falling off and prevents rattling during a telescopic operation.

[0005]

In the telescopic telephone according to the present invention, a guide groove and an engaging piece are engaged with each other to connect a main body case and a movable case which is movable with respect to the main body case. As a structure, a stopper rib is provided along the inside of the guide groove, and the bending is limited by the stopper rib when the engaging piece engaged with the guide groove bends. Further, the width of the guide groove is made smaller than the thickness of the hook portion provided at the tip of the engagement piece.

[0006]

When the external force is applied to the connecting portion, the bending of the engaging piece is limited by the stopper rib.
The engagement piece is prevented from coming off the guide groove. Further, the hook portion of the engagement piece does not easily come off the guide groove.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of one embodiment of a telescopic telephone according to the present embodiment. In the figure, a main body case 1 has a hook 6,
The back cover 2 is attached with the printed board 8 inside, and the battery cover 5 is attached outside with the battery 9 interposed therebetween.
The movable case 3 has a printed board 7 inside, and a back cover 4 is attached. An earpiece 1a is provided on a part of the front surface of the main body case 1, and a concave sliding contact surface 1b curved into a cylindrical surface is formed on the other part. It is configured to be slid along the surface 1b and extend and contract with respect to the main body case 1.

A pair of vertically long guide grooves 1c are provided at positions symmetrical to the left and right sides of the sliding contact surface 1b, and a square hole 1d is provided at a position near one end thereof. The engaging piece 6a of the hook 6 provided in the main body case 1 is projected from the sliding surface 1b into the square hole 1d. Also, a stopper rib 2a extending along the guide groove 1c is formed integrally with the back cover 2.

On the other hand, the movable case 3 is a dial key 3
a and a mouthpiece 3b. A pair of engaging pieces 4a that engage with the guide grooves 1c are provided upright on the protruding cylindrical sliding contact surface of the back cover 4 so as to be perpendicular to the sliding contact surface. A vertically long guide groove 4b is formed adjacent to the engagement piece 4a, and an engagement piece 6a of the hook 6 protruding from the main body case 1 is engaged with the guide groove 4b. here,
Needless to say, each of the engagement pieces 6a and 4a has a hook-shaped tip, and the width of the hook provided at the tip is larger than the width of the base.

The assembly of the telescopic telephone having this structure is performed as follows. First, the hook 6 and the printed board 8 are fixed in the main body case 1 and the back cover 2 is covered. Then, the battery 9 is mounted outside the back cover 2, and the battery cover 5 is attached to the back cover 2. At this time, the engagement piece 6 of the hook 6
a is projected from the sliding contact surface 1b. On the other hand, the movable case 3 fixes the printed board 7 inside, and covers and fixes the back cover 4. At this time, it goes without saying that the engaging piece 4a of the back cover 4 protrudes from the sliding contact surface. Then, the engaging piece 4a on the movable case 3 side is fitted into the guide groove 1c, and the engaging piece 6a on the main body case 1 side is engaged with the guide groove 4b, whereby the assembly is completed.

FIG. 2A shows a guide groove 1 on the body case 1 side.
FIG. 2B is a cross-sectional view showing an engaged state of the engaging piece 4a of the movable case 3 with the engaging piece 6a of the main body case 1 and the guide groove 4b of the movable case. FIG. 3 (a) and 3 (b) are longitudinal sectional views showing the engaged state of the guide groove 1c and the engaging piece 4a and the engaged state of the engaging piece 6a and the guide groove 4b. It represents the state where it was turned on. As described above, the engagement piece 4a slides along the guide groove 1c and the engagement piece 6a slides along the guide groove 4b, so that the movable case 3 moves along the sliding contact surface 1b of the main body case 1. The phone can be shortened and extended. At this time, the main body case 1 and the movable case 3 are engaged with the engagement pieces 6a, 4a protruding from the respective guide grooves 4a.
By being engaged with b and 1c, the connected state of both can be firmly maintained.

In this configuration, as shown in FIG.
By providing the stopper rib 2a along the guide groove 1c, the engagement piece 4a engaged with the guide groove 1c is provided along the stopper rib 2a, and the engagement piece 4a
Is suppressed by the stopper rib 2a, and the engagement piece 4a is prevented from coming off the guide groove 1c.
Further, as shown in FIG. 2B, the width of the guide groove 4b is
Because it is smaller than the thickness of the hook at the tip of a,
In order for the engaging piece 6a to engage with the guide groove 4b, the engaging piece 6a
Are bent outwardly, and the outer portion 4c is also bent by being pushed by the engagement member 6a. Therefore, some force is required when engaging the engaging piece 6a with the guide groove 4b, but once the engaging piece 6a is engaged, the engaging piece 6a comes off the guide groove 4b unless the outer portion 4c is bent. The movable case 3 is hardly dropped from the main body case 1.
In addition, by reducing the width of the guide groove 4b as much as possible, the lateral play of the movable case 3 can be reduced.

[0013]

As described above, according to the present invention, the stopper rib is provided along the guide groove, and the bending of the engaging piece engaging with the guide groove is limited by the stopper rib. The guide groove can be prevented from coming off. Further, since the width of the guide groove is smaller than the thickness of the hook portion of the engagement piece, the engagement piece does not easily come off the guide groove. As a result, it is possible to obtain a high-quality telephone which prevents the movable case from falling off from the main body case due to an external impact or the like, and furthermore has a reduced play when the movable case is extended and retracted.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view of one embodiment of a telescopic telephone according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part of the telephone of FIG.

FIG. 3 is an enlarged longitudinal sectional view of a main part of the telephone of FIG. 1;

FIG. 4 is an enlarged sectional view of a part of an example of a conventional telescopic telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 1c Guide groove 2 Back cover 2a Stopper rib 3 Movable case 4 Back cover 4a Engagement piece 4b Guide groove 5 Battery cover 6 Hook 6a Engagement piece 7, 8 Printed board 9 Battery

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 3-59678 (JP, U) JP-A 3-17675 (JP, U) Jiko 51-3686 (JP, Y1) (58) Survey Field (Int.Cl. ⁶ , DB name) H04M 1/02-1/23 H05K 5/00-5/06

Claims (2)

(57) [Claims] 1. A main body case and a movable case which is extended and contracted with respect to the main body case. Each sliding contact surface between the main body case and the movable case corresponds to the length of the movable case. A guide groove having a length and an engaging piece engaged with the opposing guide groove are provided, and the movable case is moved relative to the main body case while engaging and guiding these engaging pieces with each guide groove. In the telescopic telephone configured to be slidable, a stopper rib is provided along the inside of the guide groove, and the bending is limited by the stopper rib when the engaging piece engaged with the guide groove is bent. A telescopic telephone characterized by being configured as described above. 2. The telescopic telephone according to claim 1, wherein the width of the guide groove is smaller than the thickness of a hook provided at the tip of the engagement piece.