JPH0440366Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention particularly relates to a locking device installed in a drawer of a child's study table used at home.

<Prior art and problems> The above conventional locking device locks and unlocks by inserting a key that matches the locking hole into a locking hole formed on the front and turning the key. Ta. Therefore, if the key is lost, the locking device cannot be used, and if the key is lost in a locked state, the lock cannot be unlocked, which is a major problem.

<Purpose and structure of the present invention> The present invention allows you to replace the so-called key with another one even if you lose it, and is different from the conventional method of locking and unlocking by rotating the key. , aims to provide a locking device that is compatible with the current card era using a completely different method, and consists of a card insertion hole and a pawl that rotates as the card-shaped key is inserted into the card insertion hole. It consists of a rocking piece that rocks as the wheel and ratchet rotate, and a locking lever that moves up and down as the rocking piece swings.

<Example> Hereinafter, embodiments will be described based on the drawings.

In FIG. 1, 1 is a front cover, 2 is a lock body, 3 is a ratchet wheel, 4 is a swinging piece, 5 is a back cover, 6 is a locking lever, and 100 is a card type key.

The front cover 1 is fitted onto the front end of the lock body 2, and has a card insertion hole 11 formed in the lower part of the front surface. The lock main body 2 includes a front wall 21, a peripheral wall 22 that projects rearwardly and is connected to the front wall 21, and a vertical projecting wall 23 that projects vertically and is connected to the center of the rear end of the peripheral wall 22.
23, and a card insertion hole 211 is formed at the lower end of the front wall 21 in correspondence with the card insertion hole 11 formed in the front cover 1.

A connecting cylinder 2 protrudes rearward from the back surface of the left and right ends of the front wall 21 and to which the back cover 5 is screwed.
12, 212 are formed to have approximately the same depth dimension as the peripheral wall 22, and inside the connecting cylinders 212, 212,
Ratchet wheel holding walls 24 , 24 having approximately semicircular ratchet wheel holding recesses 241 , 241 formed at their rear ends are provided with approximately the same depth dimension as the peripheral wall 22 .

Furthermore, a spring 251 having elasticity in a direction that always extends inside is held inside one of the ratchet holding walls 24, 24, and a spherical stopper 251 is held at the rear end.
A temporarily fixed holding cylinder 25 having a depth approximately half of the peripheral wall 22 with the connecting cylinders 212, 212 and the ratchet holding walls 24, 24 is formed.
Card guide grooves 26, 26 are provided below to correspond to the card insertion holes 211, and the back cover 5 is provided in the lower projecting wall 23 to prevent the locking rod 6 from swinging back and forth during vertical movement. A spacing retaining protrusion 27 is formed to protrude rearward.

The ratchet wheel 3 has ratchet holding recesses 241, 241 of the lock body 2 at both left and right ends of the cylindrical ratchet main body 31.
Rotating shafts 32, 32 are formed on the peripheral end surface of the ratchet main body 31 to rotate the ratchet wheel 3 as the card-shaped key 100 is inserted. Upper locking rod pusher protrusions 33, 33 and lower locking lever pusher protrusions 34, 3 that swing in a see-saw manner.
4 are provided to protrude radially outward alternately in the circumferential direction. 35... is a stopper 252 provided in the temporary holding cylinder 25 of the lock body 2.
Correspondingly, this is a stopper fitting groove formed on the outer side of the end between the locking rod pushing upper protruding piece 33 and the locking rod pulling lower protruding piece 34, closer to the rotation shaft 32.

The swinging piece 4 is rotatably held at its center by the back cover 5, and has a locking rod fitting at one end that is pushed upward by a locking rod pusher protrusion 33 that rises as the ratchet wheel 3 rotates. A mating protrusion 41 is formed at the other end, from a position lowered as the locking rod mating protrusion 41 rises to a lower locking lever protrusion 34 that rises as the ratchet wheel 3 rotates. As a result, a pull-down protrusion hooking protrusion 42 that is pushed up is formed, and the rotation of the ratchet wheel 3,
That is, as the card-shaped key 100 is inserted, it swings in a see-saw manner, causing the locking rod 6 to move up and down.

The back cover 5 includes upper and lower pieces 51 and 52 and left and right side pieces 5 formed by bending the top, bottom, left and right ends of the board forward.
3, 54, rear piece 55, and mounting pieces 56, 57 formed outward at the front ends of left and right side pieces 53, 54.
The upper piece 51 has an insertion hole 511 for the locking rod 6 at its rear central end, and the mounting pieces 56 and 57 have mounting holes 561 and 571 corresponding to the connecting tubes 212 and 212 of the lock body 2, respectively. Attachment holes 562 and 572 are formed on the outside of the attachment holes 561 and 571 for screwing the back cover 5 to the back surface of the front panel of the drawer or the like.

At the rear end 55, there is a locking rod spring 610 that always applies upward or downward moving force to the locking rod 6.
A spring holding protrusion 551 that holds one end of the locking rod 6 and a movement prevention protrusion 552 that abuts the side end surface of the locking rod 6 and prevents the locking rod 6 from moving laterally are provided to protrude inward.

Reference numeral 553 denotes a locking rod 6 with a locking rod 6 for attaching the swinging piece 4 rotatably by caulking or the like.
is composed of a locking part 61 held in the insertion hole 511 of the back cover 5, and a driving part 62 connected to the lower right side of the locking part 61. The upper end of the locking part 61 can be moved up and down to engage and disengage from a locking hole (not shown), and the locking rod fitting protrusion 41 of the swinging piece 4 is fitted into the upper left end surface of the driving part 62. A relief hole 622 for the spring holding protrusion 551 is formed in the center of the right end of the fitting recess 621, and the driving part 62 is formed thinner than the locking part 61, and the back cover 5 A mounting space for a locking rod spring 610 is formed between the rear piece 55 and the drive section 62 in a state where the locking lever spring 610 is attached to the rear piece 55 and the drive section 62.

Reference numeral 623 denotes a mounting space retaining protrusion 624 formed on the back surface of the right lower end of the drive section 62, which is a lift stopper for the locking rod 6.

One end of the locking lever spring 610 is held in the spring holding protrusion 551 of the back cover 5, and the other end is held in the drive part 6.
It is held in the spring holding hole 625 of No. 2 and has a substantially U-shape, and constantly applies a moving force upward or downward to the locking rod 8 with a predetermined position as the boundary. The present invention is constructed as described above, and the card type key 100 is inserted through the card insertion hole 11 of the front cover 1, the card insertion hole 211 of the lock body, the card guide groove 26,
26 and is pushed in, the end of the card-shaped key 100 comes into contact with the lower locking lever protrusion 34 of the ratchet wheel 3 (the state shown in FIG. 1). Then, when the card type key 100 is pushed in again, the ratchet wheel 3 is moved to the lock body 2.
Since it is rotatably held by the ratchet retaining walls 24, 24, the locking rod pushing upper protrusion 33 fits into the locking rod fitting protrusion 41 of the rocking piece 4. The combined locking rod 6 is rotated while being pushed upward against the locking rod spring 610. Then, the locking rod 6 rises, and the end of the locking rod spring 610 held in the spring holding hole 625 is moved to the spring holding projection 5 of the back cover 5.
51 in the horizontal direction, the locking rod 6 and the locking rod fitting protrusion 41 move upward due to the elasticity of the locking rod spring 610, and the lifting stopper 623 of the locking rod 6 moves above the back cover 5. When it comes into contact with the piece, it stops and becomes locked (the state shown in Fig. 3). In this state, the other locking lever pushing upper protrusion 33 of the ratchet wheel 3 is in contact with the upper surface of the card type key 100, and the locking lever lowering protruding piece 34 is in contact with the end face of the card type key 100.
The ratchet wheel 3 does not rotate, and the card type key 100 cannot be pushed in either. Further, the stopper 252 pressed against the ratchet main body 31 by the spring 251 is in the middle of being fitted into the stopper fitting groove 35, and applies rotational force to the ratchet wheel 3 in the counterclockwise direction in FIG. 3.

Then, when the card-shaped key 100 is pulled out from this state, the ratchet wheel 3 rotates slightly counterclockwise in FIG. The locked state is maintained without any need to do so.

Next, when unlocking, insert the card type key 100 through the card insertion hole 11 of the front cover 1, and then the card insertion hole 211 of the lock body.
When guided by 6 and pushed in, card type key 1
The end of 00 comes into contact with the locking rod pushing upper protrusion 33 of the ratchet wheel 3. Then, when the card-shaped key 100 is pushed in again, the ratchet wheel 3 rotates while pushing up the lowering protrusion hooking protrusion 42 of the swinging piece 4 with the locking lever lowering protrusion 34. At the same time, the locking rod fitting projection 41 at the other end of the pull-down projection piece latching projection 42 moves downward together with the locking rod 6. When the locking rod 6 is lowered and the end of the locking rod spring 610 held in the spring holding hole 624 is located horizontally below the spring holding projection 551 on the back cover 5, the elasticity of the locking rod spring 610 The locking rod 6 and the locking rod fitting protrusion 41 then move downward and become unlocked. In this state, the other locking lever lower protrusion 34 of the ratchet wheel 3 is placed on the top surface of the card-shaped key 100.
The locking lever pushing upper protrusion 33 contacts the end face of the card-shaped key 100, and the left and right front ends of the card-shaped key 100 contact the front surfaces of the mounting pieces 56 and 57 of the back cover 5, so the ratchet wheel 3 rotates. No, card type key 10
I can't even push 0.

Further, the stopper 252 pressed against the ratchet main body 31 by the spring 251 applies rotational force to the ratchet wheel 3 in the counterclockwise direction in FIG. 3 while it is being fitted into the stopper fitting groove 35. .

Then, when the card-shaped key 100 is pulled out, the ratchet wheel 3 rotates slightly, the stopper 252 and the stopper fitting groove 35 are fitted, and the ratchet wheel 3 maintains the unlocked state without unexpectedly rotating. (Status shown in Figure 1).

In the embodiment, the ratchet wheel 3 is provided with a locking rod pushing upper protrusion 33,
A locking rod 6 and a lowering projection piece 34 are provided, and correspondingly, a locking rod fitting projection 41 and a locking rod pulling lowering projection piece 34 are provided on the swinging piece 4 to allow the locking rod 6 to move up and down. However, the shape is not particularly limited as long as the ratchet wheel 3 rotates as the card-shaped key 100 is inserted, and the swinging piece 4 converts the rotation of the ratchet wheel 3 into the vertical movement of the locking rod 6. .

Further, in the embodiment, the card insertion hole 11 is formed in the front cover 1, but depending on the shape of the lock body 2, the front cover 1 is not necessary and may be formed on the front side of the lock body 2. Nor.

As described above, the present invention is a new method that locks and unlocks by inserting and removing the card key, and even if the card key is lost, you can use a telephone card etc. as a substitute. be able to
In addition, since it has a simple structure consisting of a ratchet wheel, a rocking piece, and a locking rod, it is a useful device suitable for practical use, as it is trouble-free and can be manufactured at low cost.

[Brief explanation of the drawing]

The figure shows one of the embodiments of the present invention, FIG. 1 shows a longitudinal section of the main part of the invention, and FIG. 2 shows an A--
A is a sectional view of the main part, Fig. 3 is a longitudinal sectional view of the main part showing the locked state with the card pushed in, Fig. 4 is the back side of the lock body, and Fig. 5 is a sectional view taken along line B-B in Fig. 4. , FIG. 6 is a perspective view of the ratchet wheel, FIG. 7 is a perspective view of the rocking piece,
FIG. 8 is a perspective view of the locking rod, and FIG. 9 is a perspective view of the back cover. 1...Front cover, 11...Card insertion hole, 2
……Lock body, 3… Ratchet wheel, 4… Ratchet wheel, 5… Back cover, 6… Locking rod.

Claims (1)

[Scope of utility model registration request] A card insertion hole, a ratchet wheel that rotates as the card-shaped key is inserted into the card insertion hole, a rocking piece that swings as the ratchet wheel rotates, and a rocking piece that swings as the rocking piece swings. A locking device comprising a locking rod that moves up and down.