JP3395618B2 - Locking structure of housing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for locking a housing in a public telephone, various electronic devices and the like, and more particularly, in a box having an opening formed on one surface thereof, a structure for locking a lid covering the opening of the box. Regarding

[0002]

2. Description of the Related Art For example, in a public telephone, a box body having an opening on one side and having a box shape as a whole, and a board provided with a control circuit for controlling the apparatus, and the like, A lid that covers the opening is provided. In normal times, the lid is locked by a lock provided on the box, and is unlocked to open the opening of the housing when maintenance and inspection of the control board and the like in the housing is performed.

An example of this type of housing locking structure is disclosed in Japanese Utility Model Publication No. 5-40203. What is disclosed here is a box body in which an opening is formed on one surface and has a box shape as a whole, a lid body that covers the opening of the box body, and a vertically slidable body on both side edges of the opening of the box body. And a locking plate. The locking plate is moved up and down by a lock operation, and the locking hook provided on the locking plate is engaged with the locking piece provided on the lid to lock the lid on the box.

[0004]

However, in the above-described conventional housing locking structure, since the locking plate required only for locking is provided, the structure becomes complicated and the number of parts increases, which makes the manufacturing process difficult. There was a problem that the cost also increased. Further, since the locking plate is moved by the rotation operation of the lock, the weight of the locking plate becomes a load during the lock operation, which causes a problem of poor operability.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to simplify the structure, reduce the number of parts, reduce the manufacturing cost, and operate the lock. The object is to provide a housing locking structure that makes good

[0006]

In order to achieve this object, a locking structure of a housing according to the present invention is a box body having an opening formed on one surface, and a substantially flat plate shape covering the opening of the box body. An engaging portion having an engaging groove that opens upward is integrally provided on the side portion on the side of the lid, and the engaging portion of the housing is inserted into the side portion on the box body. And has an engaging hole having a width slightly larger than the thickness of the engaging portion, and by sliding the box body with respect to the lid body from above, the box body descends by its own weight to engage the lid body. An engaging portion that engages with the joint portion is provided, and a lock that holds the engaged state of both engaging portions is provided. Therefore, since the engaging portion that engages with the engaging portion of the box body is provided on the lid body itself, the locking plate interposed between the lid body and the box body becomes unnecessary. Since the lock only holds the state in which both the engaging portions are engaged, the weight load of the locking plate or the like is not applied during the lock operation.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a public telephone with a housing locking structure according to the present invention partially broken away, and FIG. 2 is a perspective view showing a state in which a front case is removed from a rear plate when viewed from the rear side, FIG. 3 is a perspective view of the main part of the front case, also viewed from the back side. Figure 4
7A is a sectional view taken along line IV (a) -IV (a) in FIG. 7B, FIG. 7B is a side view of the engagement piece of the rear plate in FIG. 7A, and FIG. 6 is a perspective view of the lower side of the rear plate viewed from the front. FIG. 7A is a side sectional view showing a state before the front case is attached to the rear plate, and FIG. 7B is a side sectional view showing a state where the engagement hole of the front case is engaged with the engagement piece of the rear plate. 8A is a side sectional view showing a state where the front case is lowered by its own weight, and FIG. 8B is a side sectional view showing a state where the front case is locked.

In FIGS. 1 and 2, a public telephone generally designated by reference numeral 1 covers a front case 2 as a box whose rear side is opened and which is formed in a box shape, and an opening 4 of the front case 2. A housing is formed by the rear plate 3 that functions as a lid formed in a substantially flat plate shape. Although illustration is omitted, in the front case 2, a board on which a communication circuit and a control circuit for controlling the device are mounted is mounted, and a card reading device is provided. On one side of the front plate of the front case 2,
A handset 5 is hung, and a rectangular display window 6 into which a liquid crystal display body for displaying the call frequency and various services is fitted is bored on the upper side of the other side, and a function button and a dial are placed below the rectangular display window 6. A plurality of circular operation windows 7 through which the buttons are exposed are formed.

Inside the both sides of the front case 2, a pair of rims 10 and 10 respectively extending in the vertical direction are fixed. As shown in FIG. 4A, the rims 10 and 10 are fixed.
The end 11 on the side of the opening 4 is bent into a crank shape in a plan view, and the bent portion 12 has an elongated rectangular engaging hole 12a having a width slightly larger than the thickness of the rear plate 3.
Are provided in three pairs in the vertical direction. As shown in FIG.
Rectangular guide holes 13 and 13 are formed on the front end sides of the lower portions of the rims 10 and 10 so as to face each other, and the height of the guide holes 13 is larger than the diameter of a lock pin 26 described later. Has been done. As shown in FIGS. 3 and 7, rims 14 and 15 having a crank-shaped cross section are fixed to the inside of the top and bottom of the front case 2.

In FIG. 3, a lock 17 is fixed to the lower side of one side of the front case 2.
A central portion of an operating lever 18 is pivotally attached to the rotating shaft, a stopper 18a is formed at one end of the operating lever 18, and an operating pin 19 projecting outward is planted at the other end. Below the inside of both sides of the front case 2,
The left and right lock levers 21a and 21b, which are formed in a substantially doglegged shape and have arm portions 23 and 24, are rotated so as to face each other via shafts 22 and 22 that are planted in the rims 10 and 10. It is movably supported. One lock lever 21
The arm 23 of FIG.
(A) When the lock lever 21a is engaged when it is rotated counterclockwise in the middle direction, and the lock lever 21a is rotated clockwise about the shaft 22 as a rotation center and is rotated by a certain amount, the stopper 18a causes the other arm portion to rotate. It is configured so as to abut against 24 and restrict further rotation of the operating lever 18.

The arm portion 2 of the one lock lever 21a
In FIG. 4, the operating lever 18 is engaged when it is rotated clockwise in FIG. 8B, and the lock lever 21a is rotated counterclockwise about the shaft 22 as a rotation center. ing. The other lock lever 21b is connected to one lock lever 21a via a connecting member 25, and the lock lever 21b also rotates integrally with the rotation of the lock lever 21a. A keyhole-shaped sliding hole 24a including a large diameter portion and a narrow width portion is formed at the tip of the arm portion 24 of each of the lock levers 21a and 21b. Reference numeral 26 is a lock pin as a lock member having a diameter smaller than the diameter of the large diameter portion of the sliding hole 24a, and a narrow diameter neck portion (not shown) is formed on the lock pin 26, and the neck portion slides. The lock pin 26 is slidably supported in the sliding hole 24a by being engaged with the narrow portion of the moving hole 24a so as to project outward. The tip of the lock pin 26 faces the inside of the guide hole 13 of the edge metal 10 described above.
The lock lever 21 is mounted on the bottom portion of the guide hole 3, and is configured to be horizontally guided by the bottom portion of the guide hole 13 when the lock lever 21 rotates as described above.

As shown in FIGS. 6 and 7, the upper, lower and both end portions of the rear plate 3 are bent at a right angle to the front side to form frame portions 31a, 31b, 31c, 3 respectively.
1d is formed. Of these frame parts, the frame parts 31c and 31d on both sides correspond to the three pairs of engagement holes 12a of the edge metal 10 described above, and three pairs of substantially inverted L-shaped engagement pieces 32 and 3 are provided.
3, 34 are provided so as to project to the front side. These engaging pieces 3
Engagement grooves 32a, 33a, 34a are formed between 2, 33, 34 and the end edges of the frame portions 31c, 31d, and the widths of these engagement grooves 32a, 33a, 34a are the same as those of the rim 1 described above.
The thickness of the engaging piece 3 is slightly larger than the thickness of 0.
The lower end 32b of 2 is formed horizontally. A bulging portion 35 in which a screw through hole is formed is formed in the lower portion on the back side of the rear plate 3, and brackets 36, 36 having a U-shape in plan view are fixed to the upper and lower portions. Rear plate 3
Attaches the bracket 36 to an engaging claw (not shown) fixed to the wall.
, And the screw having the bulging portion 35 inserted from the inside of the rear plate 3 is inserted into the sleeve (not shown) fixed to the wall and screwed into the wall so that the bracket 36 side is directed upward. Fixed.

Next, a method of locking the front case 2 on the rear plate 3 thus fixed to the wall will be described with reference to FIGS. 7 and 8. In FIG. 7A, the front case 2 is held by hand, the opening 4 side of the front case 2 is directed toward the rear plate 3 and moved in the direction of arrow A, and as shown in FIG. Insert the joint pieces 32, 33, 34 into the engagement holes 12a, 12a, 12a of the rim 10,
The tips of the frame portions 31c and 31d are brought into contact with the bent portion 12 of the edge metal 10.

From this state, as shown in FIG.
When the front case 2 is lowered by its own weight in the direction of arrow B, that is, when the front case 2 is lowered, the engagement grooves 32 of the engagement pieces 32, 33, 34 are formed.
The bent portion 12 of the bead 10 is inserted into the a, 33a, and 34a, and the bent portion 12 engages with the engaging pieces 32, 33, and 34, respectively. By this engagement, the movement of the front case 2 in the arrow C direction is restricted, the front case 2 is attached to the rear plate 3, and the rear case 3 closes the opening 4 of the front case 2. In this state, the front case 2 is supported by the engaging pieces 32, 33, 34, and the rim 15 below the front case 2 abuts on the frame portion 31b below the rear case 3 so that the frame is formed. It is also supported by the part 31b. Therefore, as will be described later, when the lock pin 26 is located below the lower end 32b of the engagement piece 32, the front case 2
The weight of the lock pin 26 is not applied to the lock pin 26, and the lock pin 26 is not damaged. Further, since the lock lever 21a and the operating lever 18 are interposed between the lock pin 26 and the lock 17, the weight of the front case 2 is not directly applied to the lock 17, so that the lock 17 is prevented from malfunctioning. To be done.

At this time, the lower end 32c of the lower engaging piece 32 is
Is positioned slightly higher than the upper end of the lock pin 26 of the lock lever 21. As described above, since the bent portion 12 is engaged with the engaging pieces 32, 33, 34 by the weight of the front case 2, the burden on the operator is reduced and the workability is improved. As well as
Even if the opening 4 of the front case 2 is intentionally opened, it is necessary to lift the heavy front case 2, which makes it difficult to mischief the devices and the like housed in the front case 2. In addition, since the opening 4 is closed and the front case 2 is hung on the wall at the same time, the work efficiency is improved.

Next, as shown in FIG.
Is rotated clockwise in the figure, the lock lever 21a
The operating pin 19 engaged with one arm 23 engages with the other arm 24, and the lock lever 21a rotates counterclockwise about the shaft 22 as the rotation center. This lock lever 2
By the rotation of 1a, the other lock lever 21b also rotates counterclockwise via the connecting member 25, and the lock pin 26
Also rotates counterclockwise. At this time, the lock lever 21
Since the lock pin 26 slidably supported in the sliding holes 24a of the a and 21b is supported by the bottom portion of the guide hole 13 of the edge metal 10 by its own weight, it moves substantially horizontally to the left in the drawing. Then, it is located below the lower end 32b of the engagement piece 32.

As described above, since the lock pin 26 moves horizontally, the lock pin 26 can be smoothly positioned below the lower end 32c without coming into contact with the end edge of the engaging piece 32 during the movement. Therefore, it is not necessary to provide a play with the lower end 32c. Therefore, even if a third person intentionally tries to lift the front case 2, the lock pin 26 immediately engages with the lower end 32c of the engagement piece 32, so that the upward movement of the front case 2 can be reliably prevented. At the same time, the sealed state between the front case 2 and the rear plate 3 is favorably maintained. Therefore, removal of the front case 2 from the rear plate 3 is restricted, and mischief such as damaging internal equipment by prying in a driver or the like from the gap between the front case 2 and the rear plate 3 is prevented. It

Here, in order to open the opening 4 of the front case 2 for maintenance or the like, when the lock 17 is rotated counterclockwise from the state of FIG. 8B, the operating lever 18 and the operating pin are opened. 19 also rotates counterclockwise, and the operating pin 19 engages with the arm portion 23 of the lock lever 21a.
As shown in (a) of the figure, the arm portion 23 is pressed and the lock lever 21a rotates in the clockwise direction with the shaft 22 as the rotation center, so that the lock pin 26 moves to the right in the figure and the engaging piece. Three
2 from the lower position of the lower end 32b. When the front case 2 is lifted upward by hand, the engagement between the engagement pieces 32, 33, 34 and the bent portion 12 of the bead 10 is released as shown in FIG. The pieces 32, 33, 34 face the respective insertion holes 12a, 12a, 12a of the bent portion 12. When the front case 2 is moved in the direction opposite to the arrow A in FIG. 1A, the engaging pieces 32, 33, 34 are disengaged from the engaging holes 12a, 12a, 12a of the bent portion 12, so that the front The case 2 is removed from the rear plate 3 and the opening 4 is opened.

In this embodiment, the operating lever 18
Lock lever 21a that rotates by engaging with the operating pin 19 of
Although the rear plate 3 is locked via the lock plate, the operating pin 19 of the operating lever 18 of the lock 17 is directly engaged with the engaging piece 32.
The lower end 32c of the lock lever 21a may be engaged, in which case the lock lever 21a becomes unnecessary. Also, lock 1
In order to move the lock pin 26 horizontally in conjunction with the rotation operation of 7, the lock lever 21a rotatably supported by the rim 10 and the guide hole 13 of the rim 10 are used, but the cam mechanism and the pinion are used. , A rack mechanism, etc., and various design changes are possible. Further, although the rear plate 3 is fixed to the wall and the front case 2 is lowered by its own weight, the rear plate 3 may be horizontal and the front case 2 may be moved horizontally. You may incline. Further, the rear plate 3 may be used as the front plate by providing the opening 4 on the front surface side of the front case 2. Further, although an example applied to a public telephone is shown, the invention can be applied to a lock structure of a housing of various devices. Further, in the present embodiment, an example in which the entire back side of the front case 2 is opened is shown, but it is also applicable to a structure in which a part of the back side is opened.

In the present embodiment, the bent portion 12 of the rim 10 of the front case 2 also functions as a guide for slidably supporting the front case 2 in the vertical direction. By separately providing a guide that slidably supports in the vertical direction, an inverted L-shaped engaging piece that engages with the engaging pieces 32, 33, 34 may be provided instead of the bent portion 12. , Various design changes are possible. Further, the left and right frame portions 31c and 31d of the rear plate 3
Is formed so as to extend vertically, the engaging pieces 32, 3
It may be formed only on the portion where the portions 3, 34 are formed. Further, although the bent portion 12 and the engagement hole 12a are formed in the edge member 10, they may be directly formed in the front case 1, and the engagement piece 3 may be formed.
2, 33, 34 may also be formed via the edge metal.

[0021]

As described above, according to the present invention, after the box is moved, the lock is operated, and the locking operation of this lock merely holds the engaged state of both engaging portions. No load is applied during the lock operation, which improves the operability of the lock. Also, by providing the box with an engaging part that engages with the engaging part of the lid by sliding the box itself with respect to the lid, there is no need for a locking plate that moves with a lock as in the conventional case. Therefore, the number of parts is reduced, the structure is simplified, and the manufacturing cost is reduced. Also, since the weight of the box is supported by the engaging portion,
Since the lock is not loaded with weight, it is possible to prevent the lock from being damaged.

Further, according to the present invention, by providing both the engaging portions on both sides of the lid and the box, the housing can be locked more reliably.

Further, according to the present invention, since the box body is slid downward by its own weight, the burden on the operator is reduced, workability is improved, and the opening of the box body is intentionally performed. Even when trying to open the box, it is necessary to lift the heavy box side, which makes it difficult to mischief the devices and the like housed in the box. Further, since the opening of the box is closed and the wall is hung on the wall at the same time, the work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a public telephone to which a housing locking structure according to the present invention is applied.

FIG. 2 is a perspective view showing a state in which the front case is removed from the rear plate when the locking structure for the housing according to the present invention is viewed from the back side, and a perspective view showing the state in which the rear plate is removed.

FIG. 3 is a perspective view of a main part of the front case of the housing locking structure according to the present invention as viewed from the back side.

FIG. 4 (a) is IV (a) -IV in FIG. 7 (b).
(A) A line sectional view, (b) is a side view of the engagement piece of the rear plate in (a).

FIG. 5 is an enlarged perspective view of a main part of the lock lever in the housing locking structure according to the present invention.

FIG. 6 is a perspective view of the lower side of the rear plate in the housing locking structure according to the present invention as viewed from the front.

FIG. 7 (a) is a side sectional view showing a state before the front case is attached to the rear plate in the housing locking structure according to the present invention, and FIG. 7 (b) is the engagement of the front case with the engagement piece of the rear plate. It is a side sectional view showing the state where the hole was engaged.

FIG. 8A is a side sectional view showing a state in which the front case is lowered by its own weight in the casing locking structure according to the present invention, and FIG. 8B is a side sectional view showing a locked state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Public telephone, 2 ... Front case, 3 ... Rear plate, 4 ... Opening, 10 ... Edge, 12 ... Bending part, 12a ... Engagement hole, 17 ... Lock, 18 ... Operating lever, 19 ... Operating pin, 21 ... Lock lever, 26 ... Lock pin, 32, 3
3, 34 ... Engaging piece, 32b, 33b, 34b ... Engaging groove.

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 65/00 E05B 63/00 B05K 5/02 H04M 1/02

Claims (2)

(57) [Claims] 1. A comprising a box body with an opening formed on one surface, and the box lid member formed in a substantially flat brewing covering the opening of the front
Engagement part having an engagement groove that opens upward on the side part of the cover body side
Is integrally provided, and the housing is provided on the side of the box body side.
The engaging part of the body is inserted and slightly larger than the thickness of this engaging part.
It has an insertion hole with a threshold width, and this box is placed above the lid.
By sliding from one side, the box body descends by its own weight and
An engaging portion that engages with the engaging portion of the body is provided, and both engaging portions are
A lock structure for a housing, characterized in that a lock for holding the engaged state is provided . 2. The housing locking structure according to claim 1 , wherein at least one pair of engaging portions are provided on both sides of the lid and the box, and the lock is pivotally supported by the box.
It is equipped with a lock lever that rotates in conjunction with operation.
Both the engaging parts are engaged with the clever by rotating the lock.
In addition to providing a lock member for holding the above state,
A locking device for a housing, characterized in that a pair of lock levers are provided on the left and right by connecting the lock levers with a connecting portion extending in the left-right direction of the box body.