JPS6349806Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a buffer structure for a recovery mechanism implemented in a hanger arm of a public telephone, a return lever of a vending machine, etc.

[Prior art]

In public telephones, when the handset is suspended, the hanger arm rotates, and this action opens the telephone circuit and at the same time opens the flapper that forms one side plate of the coin sorting passage. It is configured. For example, as disclosed in Japanese Utility Model Application Publication No. 57-141463, in order to simplify the mechanism and reduce the number of parts, in conventional public telephones, the shaft of the hanger arm and the actuating member that opens and closes the flap are combined. It was a directly connected structure.

By the way, some people who use public telephones
Many people handle the handset roughly, and by throwing it onto the hanger arm when returning the handset, unnecessarily excessive force may be applied to the hanger arm. For this reason, a direct impact force is applied to the flapper through the hanger arm, resulting in frequent accidents in which the flapper is damaged.

[Problem that the invention attempts to solve]

In order to solve this problem, consideration has been given to interposing a buffer mechanism between the two members, which absorbs and alleviates the impact force applied to the hanger arm and transmits it to the flapper operating member. This buffer mechanism must be a mechanism with a simple structure that is easy to assemble and maintain, and has a low occurrence of failure, without increasing the size of public telephones for which there is a strong demand for miniaturization. It is not possible to use existing hydraulic dampers, link mechanisms, etc. as is.

[Means for solving problems]

The present invention provides a buffer structure for a recovery mechanism that solves the above-mentioned problems, and includes a rotationally supported recovery lever and a shaft hole through which one end of the support shaft of the recovery lever passes. In addition, a rotation angle setting member rotatably mounted on the support shaft and a return spring provide a habit of returning to the initial position, and the rotation angle is adjusted by the acting force of the return spring. a rotatable actuating member that is engaged with the setting member; and a rotatable actuating member that is loosely assembled to the support shaft of the recovery lever, giving the lever a turning habit in the same direction as the actuating member, and the turning angle. The setting member is provided with a rotation transmitting and absorbing spring that imparts a rotational habit in the opposite direction, the shaft of the recovery lever has a semicircular portion, and the shaft hole of the rotation angle setting member is formed in the semicircular portion. It is characterized in that it is formed into a substantially fan shape having a center angle larger than the center angle of the circular portion, and is configured such that the semicircular portion is inserted with play in the rotating direction of the recovery lever.

[Effect]

In the present invention, the semicircular part of the recovery lever is inserted into the substantially fan-shaped shaft hole provided in the rotation angle setting member with some play in the rotation direction of the lever, so that the recovery lever is enlarged by a corresponding amount. When an impact force is applied and the rotation angle setting member is rotated, the rotation transmission/absorption spring is compressed by the amount of play and absorbs the impact force, thereby preventing excessive force from being transmitted to the rotation angle setting member.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Figures 1 to 3 show an example in which the buffer structure of the recovery mechanism according to the present invention is applied to the hanger arm of a public telephone, and Figure 1 shows the inside of the telephone housing. Fig. 2 is a front view when the transceiver is removed, and Fig. 3 is an exploded perspective view of the buffer structure. be. In these figures, reference numeral 1 denotes a box-shaped telephone housing with an open front and a sealed front door (not shown);
A hanger arm (recovery lever) 3 is rotatably disposed on the side of the holder, and a transmitter/receiver 4 is removably hooked onto the hanger arm 3.

The hanger arm 3 extends substantially horizontally in the front-rear direction along the left side plate 2, and its rear end is screwed into an outer end threaded portion of a shaft 5 passing through the left side plate 2 and fixed with a nut 6. has been done. The shaft 5 is rotatably supported by a bracket 8 fixed to the inner surface of the back plate 7 constituting the telephone housing 1, and the inner end thereof has a central angle θ ₁ (see FIG. 4). but
It has an approximately semicircular cross-sectional shape of 180°, and a rotation angle setting member 10 and a plate 1 are attached to this semicircular portion 9.
1 is fitted.

The rotation angle setting member 10 has a pair of left and right side plates 1.
0A, 10B, and a connecting plate 10c that connects these side plates 10A, 10B, and is formed in a substantially U-shape, and the semicircular portion 9 of the shaft 5 is inserted through each side plate 10A, 10B. A hole 12 is formed coaxially. The semicircular portion 9 is inserted through the shaft hole 12 with some play in the rotating direction, and as shown in _FIG . It is formed into a substantially fan shape having an angle θ ₂ (for example, 220 degrees). On the other hand, the plate 11 has a semicircular hole 14 which is substantially the same as the semicircular part 9 of the shaft 5.
One end 15a of a rotation transmitting and shock absorbing spring 15 having a large spring force is locked to the upper edge thereof. Said spring 1
5 is mounted on the semicircular portion 9 of the shaft 5, and the other end 15b is pressed against the rotation angle setting member 10, so that the shaft 5 has a rotational habit in the direction of arrow A in FIG. 3, that is, in the restoration direction. On the other hand, the rotation angle setting member 10 is given a rotation habit in the direction opposite to the axis 5, that is, in the direction of arrow B. A pressing member 16 is screwed to the right side plate 10B of the rotation angle setting member 10, and the vertical movement of the pressing member 16 controls opening and closing of a switch 17 for disconnecting and connecting the telephone line. Further, a cover 18 that covers the fulcrum portion of the hanger arm 3 is fixed to the left side plate 2 with screws from inside the housing.

A support bracket 20 is further fixed to the inner surface of the back plate 7 of the telephone housing 1, and is located on the right side of the bracket 8.
An actuating member 21 which is rotated in conjunction with the hanger arm 3 is rotatably supported on the hanger arm 3. The operating member 21 is the flapper 2 of the coin sorting mechanism 22.
4, a return spring 25 always gives a return habit in the direction of arrow C in FIG. 1 (same direction as the direction of arrow A in FIG. It integrally has an operating rod 27 that engages from above. Note that the actuating member 21 is attached to both end folded portions 2 of the support bracket 20.
It is supported via a pair of bearing members 28 and 29 that are rotatably supported on the left side bearing member 28, respectively. The tip of the rotation angle setting member 1 is rotated by the action force of the spring 25.
It is pressed against the right side plate 10B of No. 0 from below. The flapper 24 is rotatably attached to the surface of a board 33 provided upright within the telephone housing 1 via a bracket 34, so that the flapper 24 can be freely opened and closed.
Normally, when the handset 4 is hung on the hanger arm 3 and in a non-talking state, it is opened as shown in FIG. In the communication state shown in the figure, it is released from the operating member 21 and closed, and is configured to face the substrate 33 in parallel with a predetermined distance therebetween.

Next, the operation and buffering effect of the hanger arm with the above configuration will be explained.

As shown in FIG. 2, when the transmitter/receiver 4 is not hung on the hanger arm 3, the hanger arm 3 is given a return habit by the return spring 25 of the actuating member 21, so it is in the uppermost position. Retained. That is, the acting force of the return spring 25 is applied to the hanger arm 3 via the operating member 21 - the bearing member 28 - the contact member 30 - the rotation angle setting member 10 - the rotation transmission and shock absorption spring 15 - the shaft 5. is transmitted to. The rotation transmitting/shock absorbing spring 15 biases the shaft 5 and the rotation angle setting member 10 so that they rotate in opposite directions, thereby forming a semicircular portion as shown in FIG. The lower half flat surface 9a of the shaft hole 12 and the lower straight portion 12a of the shaft hole 12 are brought into pressure contact with each other.

In this state, if the hanger arm 3 is strongly rotated and lowered due to the handset 4 being latched or for some other reason, the shaft 5 and plate 11 will rotate together with the hanger arm 3 in the counterclockwise direction in FIG. be done. At this time, the rotation angle setting member 10 rotates integrally with the shaft 5 while maintaining the pressure contact state between the lower half flat surface 9a and the lower straight portion 12a due to the action of the rotation transmitting and shock absorbing spring 15. The hanger arm 3 is moved to push down the abutting member 30 and transmit the rotation of the hanger arm 3 to the actuating member 21. For this reason, the actuating member 2
1 is rotated against the return spring 25, and in conjunction with this, the operating rod 27 is lowered to push down the protrusion 26 and open the flapper 24. Here, the hanger arm 3 is rotated by an angle larger than the maximum rotation angle of the actuating member 21, in other words, the maximum opening angle of the flapper 24, and this extra rotation is absorbed by half of the shaft 5. This is made possible by the circular portion 9 and the shaft hole 12, and at the same time, the impact at the end of the rotation is absorbed by the rotation transmitting and impact absorbing spring 15.

That is, even after the actuating member 21 rotates at the maximum angle and stops, the hanger arm 3 continues to rotate by the angle difference (θ ₂ −θ ₁ ) between the center angles θ ₁ and θ ₂ shown in FIG. be done. At this time, since the rotation angle setting member 10 is in contact with the abutment member 30 and held in that position, the rotation transmission/shock absorption spring 15 is moved by an amount corresponding to the angle difference (θ ₂ −θ ₁ ). The hanger arm 3 absorbs the rotational force of the hanger arm 3. Therefore, the upper half flat surface 9b of the semicircular part 9
Even if the hanger arm 3 stops due to collision with the upper straight part 12b of the shaft hole 12, the impact at this time is absorbed by the spring 15 and becomes small.
The rotation angle setting member 10, the abutting member 30, the operating member 21, and even the flapper 24 will not be damaged.

Then, when the force applied to the transmitter/receiver 4 or the arm 3 is removed, the hanger arm 3
It is rotated back to the upper position by the action of the rotation transmission and shock absorption spring 15 and the return spring 25, and the state shown in FIG. 2 is maintained.

Although the above embodiment has been described with reference to the case where it is applied to the hanger arm of a public telephone, the present invention is not limited to this and can be applied to various devices equipped with a recovery mechanism, such as the return lever of a vending machine. It is something.

[Effect of idea]

As explained above, the buffer structure of the recovery mechanism according to the present invention includes a recovery lever that has a shaft having a semicircular portion and is rotatably supported, and a substantially fan-shaped shaft hole.
a rotation angle setting member having a semicircular portion of the shaft inserted into the shaft hole with some play in the rotation direction of the recovery lever; A rotation transmitting/shock absorbing spring that applies rotational force in the opposite direction and a spring that is rotatably supported and has a return behavior in the same direction as the return direction of the recovery lever are pressed into contact with the rotation angle setting member. Since the shock at the end of rotation of the recovery lever can be reliably absorbed by the rotation transmission and shock absorbing spring, the operating member etc. will not be damaged and the device itself will not be damaged. can be prevented.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment in which the present invention is applied to a hanger arm of a public telephone.
The figure shows the inside of the phone, a front view when the handset is turned on, Figure 2 is a front view when the handset is removed, Figure 3 is an exploded perspective view of the buffer structure, and Figure 4 shows the semicircular part of the shaft and the shaft hole. FIG. 3... Hanger arm (recovery lever), 5...
Shaft, 9... Semicircular portion, 10... Rotation angle setting member, 12... Shaft hole, 15... Spring for rotation transmission and shock absorption, 21... Operating member, 25... Spring for return.

Claims (1)

[Scope of utility model registration request] A recovery lever rotatably supported; a rotation angle setting member rotatably disposed on the shaft and having a shaft hole through which the shaft of the recovery lever passes; and a rotation angle setting member rotatably supported on the shaft. an actuating member which is given a return habit by a return spring and is pressed into contact with the rotation angle setting member; and a member which is mounted on the shaft of the recovery lever and gives the lever a rotation habit in the same direction as the actuating member. , a rotation transmitting and shock absorbing spring that imparts a rotational habit in the opposite direction to the rotation angle setting member; the shaft of the recovery lever has a semicircular portion; The shaft hole is formed in a substantially fan shape having a center angle larger than the center angle of the semicircular part, and the semicircular part is inserted through with some play in the rotating direction of the recovery lever. Mechanism buffer structure.