JP3240810U - school bag lock - Google Patents

Abstract

A school bag lock having a low environmental load and a high compatibility with a child's body is provided. A lock plate 12 attached to a hanging lid 11 of a school bag and a lock body 13 attached to a storage body of the school bag for locking/unlocking the lock plate 12. The lock body 13 is A base 14 having a daruma connecting portion at its left and right ends, a daruma 16 rotatably connected to the daruma connecting portion, and a lock unit 15 disposed on the central back side of the base 14 and engaged with and disengaged from the locking plate 12. The locking plate 12, base 14 and daruma 16 are made of JIS standard SUS316L surgical stainless steel. [Selection drawing] Fig. 1

Description

There is an application for application of Article 30, paragraph 2 of the Patent Act, which is applied mutatis mutandis under Article 11 of the Utility Model Act. exhibition

The present invention relates to a lock for school bags.

Conventionally, lid fasteners for school bags and bags are made of metal such as aluminum or steel or made of synthetic resin. These fittings and their parts are plated with chrome plating, nickel plating, or the like in order to prevent rust and improve appearance (see Patent Document 1).

On the other hand, it has been proposed to use a stainless steel plate, which is non-magnetic and highly durable, for the lid stopper in order to utilize the attractive force and the repulsive force of a magnet (see Patent Document 2). A method of manufacturing a locking plate (locking plate) attached to a hanging lid of a school bag by punching, stamping, and bending a stainless steel plate has also been proposed (see Patent Document 3).

Japanese Patent Application Laid-Open No. 2001-252121 JP 2021-65564 A JP 2010-240143 A

There is a problem that plating and painting have a large environmental load. Even if stainless steel is used, it may affect the child's body, such as allergies. SUMMARY OF THE INVENTION An object of the present invention is to provide a lock for a school bag that has a low environmental load and a high affinity with children's bodies.

The school bag lock 10 of the present invention comprises a lock plate 12 attached to the hanging lid 11 of the school bag, and a lock body 13 attached to the storage body of the school bag for locking/unlocking the lock plate 12. A lock main body 13 has a base 14 having a daruma connecting portion at its left and right ends, a daruma 16 rotatably connected to the daruma connecting portion, and a central back side of the base 14, and engages and disengages with the lock plate 12. - 特許庁The locking plate 12, the base 14 and the daruma 16 are made of JIS SUS316L surgical stainless steel.

In the school bag lock 10, the base 14 has an upper surface 14a, a peripheral wall 14b extending downward from the periphery of the upper surface 14a, and a box-shaped projection 14c projecting upward from the central portion of the upper surface. A slit 14d1 into which the lock plate 12 is inserted is preferably formed in the front surface 14d of the projection 14c. Further, it is preferable that the end portion of the base 14 is formed in a semicircular shape in plan view.

The lock unit 15 includes a support plate 17, a pair of lock levers 18 rotatably connected to the support plate 17, and a spring 19 that biases the lock levers 18 in the direction in which the ends thereof close. The lock lever 18 has an engaging portion 18a at its tip that engages with the locking plate 12, an intermediate portion that is rotatably supported by the support plate 17, and a rear end that is an operation portion for unlocking. 18a1, the interval between the engaging portions 18a of the left and right lock levers 18 is narrower than the interval between the portions (20) rotatably supported, and the left and right side surfaces 14e of the convex portion 14c of the base 14. An opening 14e1 is provided through which the operating portion 18a1 protrudes, and the lock plate 12 has teeth 12e1 on both side edges that engage with the engaging portions 18a of the lock unit 15. The engaging portions 18c are While opening the closed lock levers 18 as a pair, the teeth 12e1 of the lock plate 12 are allowed to enter, and the teeth 12e1 that have entered are not allowed to leave. More preferred are those that are adapted to allow detachment. In that case, it is particularly preferable that the teeth 12e1 are arranged in a row of teeth 12e with two or more on each side.

The lock of the school bag of the present invention does not require painting or plating because the locking plate, base and daruma are made of JIS standard SUS316L surgical stainless steel. Therefore, the environmental load during manufacturing is low. And it has a high affinity with the body of the user, that is, the hands and fingers of a child who carries the school bag.

In such a school bag lock, the base has an upper surface, a peripheral wall extending downward from the periphery of the upper surface, and a box-shaped projection projecting upward from the central portion of the upper surface. In the case where a slit for inserting the locking plate is formed in the body, it is easy to mold into an accurate shape in spite of the fact that surgical stainless steel is hard and relatively difficult to mold.

Further, when the end portion of the base is formed in a semicircular shape in plan view, press molding can be performed more accurately.

The lock unit includes a support plate, a lock lever whose base is rotatably connected to the support plate, and a spring that biases the lock lever in a direction in which the tip of the lock lever closes. has an engaging portion that engages with the locking plate, an intermediate portion is rotatably supported by the support plate, a rear end is an operation portion for unlocking, and left and right side walls of the convex portion of the base is provided with an opening for protruding the operation portion, the lock plate has teeth on both side edges thereof that engage with the engaging portions of the lock unit, and the engaging portions are a pair of left and right and are closed As long as it allows the teeth of the lock plate to enter while opening the lock lever and does not allow the intruded teeth to come off, and allows the teeth to come off by pushing the left and right operation parts. , locking and unlocking operations are easy.

In this case, when the teeth are arranged in a row of two or more teeth on each side, it is possible to select a position for stopping the hanging lid according to the amount of textbooks to be put in the school bag, which is convenient.

1 is a perspective view showing an embodiment of a lock for a school bag of the present invention; FIG. FIG. 2 is a perspective view showing the lock unit in FIG. 1 during assembly; 3A and 3B are perspective views showing the lock lever in FIG. 2 during assembly. FIG. 4A is a plan view of the key part of the lock, and FIG. 4B is a plan view of the key part showing a state in which the lock plate is inserted. FIG. 10 is a plan view of the main part showing a state in the middle of the locking operation of the lock; It is a top view which shows the locked state of a lock.

The lock 10 of the school bag shown in FIG. It consists of a lock body 13 for unlocking. The locking plate 12 is fixed to the lower end of the hanging lid 11 with an L fitting 12a and two rivets 12b. The lock plate 12 includes a base portion 12c fixed to the lower end of the hanging lid 11 and an insertion portion 12d inserted into the lock main body 13. Teeth rows 12e are formed on the left and right side edges of the insertion portion 12d. ing.

As shown in FIG. 4A, each tooth 12e1 of the tooth row 12e has a tip end edge 12e2 inclined and a rear end edge 12e3 that is substantially inclined with respect to the inserting/removing direction of the lock plate 12 (center line J). It is trapezoidal or triangular with right angles. The grooves 12e5 between the teeth 12e1 are likewise trapezoidal or triangular. The lock plate 12 and the L metal fitting 12a are each manufactured by pressing a plate material of surgical stainless steel (JIS SUS316L). The plate thickness of the material of the lock plate 12 is about 1.5 mm, and the plate thickness of the L fitting 12a is about 1 mm. Surgical stainless steel is used for medical purposes and accessories.

The lock body 13 has a base 14 fixed to the bottom surface of the container of the school bag, a lock unit 15 housed inside the base 14, and a pair of daruma dolls 16 attached to the left and right ends of the base 14. . The daruma 16 is a cup-shaped metal fitting that connects a substantially C-shaped connecting ring attached to the lower end of the shoulder belt, particularly the lower belt, of the school bag to the base 14 . A hole 16b through which the rivet 16a is passed is formed in the center of the top wall of the dharma 16, and a pair of holes 16c for attaching a connecting ring (not shown) is formed in the side wall.

The dharma 16 is rotatably attached to the base 14 by rivets 16a. The rivet 16a penetrates the base 14 and the bottom plate of the school bag, and has a function of attaching the base 14 to the container of the school bag in addition to its function as a rotating shaft. A compression coil spring 16 d is interposed between the daruma 16 and the upper surface of the base 14 . A compression coil spring 16d is arranged so as to surround the rivet 16a, and by urging the daruma 16 upward, the contact between the daruma 16 and the base 14 is relieved.

The base 14 has an upper surface 14a having an oval planar shape (specifically, the left and right ends are semicircular and the intermediate portion is rectangular), a peripheral wall 14b extending downward from the periphery of the upper surface 14a, and a wall extending downward from the upper surface 14a. and a substantially rectangular parallelepiped box-shaped convex portion 14c protruding upward. The convex portion 14c has a rectangular top surface, a front surface 14d and a rear surface that are continuous with the peripheral wall 14b, and left and right side surfaces 14e. A slit 14d1 into which the lock plate 12 is inserted is formed in the front surface 14d, and openings 14e1 through which the operating portion 18a1 of the lock lever 18 protrudes are formed in the left and right side surfaces 14e.

The base 14 and the daruma 16 are manufactured by subjecting a plate material of surgical stainless steel (JIS SUS316L) to press working such as blanking, drawing, drilling, and trimming. The thickness of the plate material is, for example, about 0.8 mm. Surgical stainless steel does not require painting or plating, so it has a low environmental impact, and because it has a high affinity with the body, metal allergies are less likely to occur. Moreover, since surgical stainless steel is used for the large parts appearing on the surface, it is possible to obtain the school bag lock 10 which has a lower environmental load and a high affinity with the user's body.

The rivet 16a is, for example, a flat hollow rivet made of stainless steel such as JIS SUS304 and having a shaft diameter of 5 mm, and the compression coil spring 16d is also made of stainless steel such as SUS304. Since these are usually manufactured from wire rods or are purchased items, ordinary stainless steel such as SUS304, which is easier to process and obtain than SUS316L, is used. By using stainless steel, it is possible to contribute to the reduction of environmental load and the improvement of compatibility.

As shown in FIG. 2, the lock unit 15 includes a support plate 17 housed in the base 14, a pair of left and right lock levers 18 rotatably connected to the support plate 17, and the lock levers 18 at their ends. A so-called chicken wing lock mechanism including a spring 19 for biasing in the closing direction is employed. Since the spring 19 urges the lock lever 18 to rotate clockwise and counterclockwise, it uses a pair of torsion coil springs having opposite torsion directions. The support plate 17 consists of a central portion 17a that supports the lock lever 18 and left and right leg portions 17b that support the central portion 17a. The leg portion 17b extends downward from the edge of the central portion 17a, is bent so as to expand horizontally, and is bent so as to extend upward so as to have a substantially U-shaped cross section. The strength and rigidity are increased by those leg portions 17b.

A hole 17c through which a support shaft 20 for rotatably supporting the lock lever 18 is inserted is formed in the vicinity of the left and right ends of the central portion 17a and in the vicinity of the center in the front-rear direction. A hollow rivet, for example, is used as the support shaft 20 . Further, a pair of cut-and-raised pieces 17a1 are provided in the central portion 17a inside the hole 17c through which the support shaft 20 is passed. The pair of cut-and-raised pieces 17a1 form a substantially U-shaped lock slit, and the portion surrounded by the slit is bent upward and raised. The inner surfaces (faces facing each other) of the cut-and-raised pieces 17a1 serve as guides during insertion/extraction operations of the lock plate 12 (see FIGS. 4B and 5).

As shown in FIG. 3A, the lock lever 18 is an elongated member formed by bending a sheet of metal plate into a substantially U-shape. It has an engaging portion 18a. Two plate pieces 18b are provided inside the lock lever 18, and a hole 18c through which the rotating shaft 23 is passed is formed in the plate pieces 18b. Further, a hole 18d through which the support shaft 20, which is the center of rotation, passes is formed in the approximately central portion of the lock lever 18 in the front-rear direction, and the rear end thereof is an operation portion 18a1 for unlocking.

The tip of the support shaft 20 (upper end in the drawing) is passed through the hole 21a of the holding plate 21, and the exposed portion is crimped to attach the lock lever 18 to the support plate 17 so as not to come off. The holding plate 21 is formed with a slit 21b through which the upper end of the cut-and-raised piece 17a1 passes. The tip of the cut-and-raised piece 17a1 may be bent to prevent it from coming off. The support shaft 20 may be provided so as to pass downward through the holding plate 21 , the lock lever 18 and the support plate 17 .

The engaging portion 18a of the lock lever 18 has a cylindrical roller (free washer) 22 inserted between the two plate pieces 18b, and a rotary shaft 23 that holds the roller 22 rotatably. The rotating shaft 23 is formed of a flat hollow rivet, and is prevented from coming off by crimping the end portion of the lock lever 18 protruding to the back side.

The roller 22 is for smooth contact and sliding with the teeth of the lock plate 12 . In this embodiment, the rotating shaft 23 has its head up and its tip down, but it may be reversed. In this embodiment, the lock lever 18 rotates so as to slide on the upper surface of the central portion 17a. 2 and 4, in order to avoid interference with the head portion of the rotating shaft 23 or the caulked portion, an arc-shaped groove 17a3 extending forward from an opening 17a2 of the cut-and-raised piece 17a1 is formed. ing.

As shown in FIG. 3B, the two plate pieces 18b of the lock lever 18 have springs 19 arranged concentrically with holes 18d through which the support shafts 20 pass, and the support shafts 20 pass through the holes 18d and the springs 19. and fixed to the support plate 17 as described above. One arm of the torsion spring forming the spring 19 is locked by the lock lever 18, and the other arm is locked by a hole, opening, cut-and-raise, or the like formed in the support plate 17. As shown in FIG.

In this embodiment, the support plate 17, the lock lever 18 and the holding plate 21 are also made of surgical stainless steel (SUS316L), and can be manufactured by pressing a 0.8 mm thin surgical stainless steel plate, for example. The supporting shaft 20, rotating shaft 23 and roller 22 are made of ordinary stainless steel (SUS304).

Next, with reference to FIGS. 4A, 4B, 5 and 6, the operation of the lock 10 for school bags constructed as described above will be described. As shown in FIG. 4A, in a free state in which no external force is applied, the lock lever 18 is inclined so that the tip side is closer to the center in plan view. As a result, the interval between the left and right lock levers 18 is narrowed on the tip end side. Therefore, when the lock plate 12 is inserted, the left and right lock levers 18 are rotated in the direction in which the tip end side widens against the biasing force of the spring 19 (see FIGS. 4B and 5). Conversely, if the lock plate 12 is pulled, the lock lever 18 tends to rotate in a direction in which the tip side becomes narrower, so that it cannot be pulled out (see FIG. 6).

When the lock plate 12 is inserted in the direction of the arrow A from the state shown in FIG. 4A, the tip of the lock plate 12 hits the roller 22 of the engaging portion of the lock lever 18 as shown in FIG. 4B. When the lock plate 12 is pushed further, the left lock lever 18 is rotated counterclockwise and the right lock lever 18 is rotated clockwise while resisting the biasing force of the spring (torsion spring) 19 as shown in FIG. can be made As a result, the locking plate 12 can be pushed all the way in. At this time, since the edge 12e2 on the tip side of the tooth 12e1 is inclined so as to recede from the center toward both sides, the tip side of the lock lever 18 can be opened more easily.

When the teeth 12e1 of the lock plate 12 get over the rollers 22 of the lock lever 18, the rollers 22 enter the grooves 12e5 between the teeth 12e1 as shown in FIG. Note that FIG. 6 shows a state in which two teeth 12 e 1 have gotten over the roller 22 . When the roller 22 is in the groove 12e5, the tilt angle .theta. of the lock lever 18 with respect to the center line J returns to approximately the same magnitude as the tilt angle in the natural state in FIG. 4A. Further, the operating portion 18a1 of the lock lever 18 protrudes greatly from the side surface 14e of the convex portion 14c of the base 14. As shown in FIG. In this state, even if an attempt is made to pull out the lock plate 12, the lock lever 18 tends to rotate in a direction in which the distal end side becomes narrower, so it tries to enter the groove 12e5 further and cannot be pulled out. This state is the locked state. The fact that the edge 12e3 on the rear end side of the tooth 12e1 is substantially perpendicular to the central axis J also contributes to the prevention of pulling out.

To release the lock, the operating portions 18a1 of the left and right lock levers 18 protruding from the side surfaces 14e of the convex portion 14c of the base 14 are pushed by fingers (see arrow C). Since the engagement portion 18a is thereby opened, the engagement between the teeth 12e1 of the lock plate 12 and the engagement portion 18a is released, and the lock plate 12 can be pulled out.

Although preferred embodiments of this invention have been described above, this invention is not limited to the embodiments, and various modifications can be adopted without departing from the gist of the invention. For example, in the above-described embodiment, parts that are difficult to process, such as the rotating shaft, support shaft, and spring, and purchased items use ordinary stainless steel that is easy to obtain, but these can also be made of surgical stainless steel. .

10 Lock 11 Hanging lid 12 Lock plate 12a L metal fitting 12b Rivet 12c Base 12d Insertion part 12e Tooth row 12e1 Teeth 12e2 Front edge 12e3 Rear edge 12e5 Groove 13 Lock main body 14 Base 14a Upper surface 14b Peripheral wall 14c Convex Part 14d Front face 14d1 Slit 14e Side face 14e1 Opening 15 Lock unit 16 Daruma 16a Rivet 16b (of Daruma) Hole (for rivet)
16c hole (for connecting ring)
16d compression coil spring 17 support plate 17a center portion 17a1 cut-and-raised piece 17a2 opening 17a3 (arc-shaped) groove 17b leg portion 17c hole 18 lock lever 18a engaging portion 18a1 operating portion 18b plate piece 18c (turning Hole 18d (for passing the driving shaft) Hole 19 (for passing the support shaft) Spring (torsion coil spring)
20 Support shaft 21 Holding plate 21a Hole 21b (through which the support shaft passes) Slit 22 Roller 23 Rotating shaft A Insertion direction of lock plate B Pull-out direction of lock plate C Push-in direction of operation part

Claims (5)

A locking plate attached to the hanging lid of the school bag,
and a lock body attached to the storage body of the school bag for locking/unlocking the locking plate,
The lock main body is composed of a base having a daruma connecting part at the left and right ends, a daruma rotatably connected to the daruma connecting part, and a lock unit arranged on the central back side of the base and engaged with and disengaged from the lock plate. become,
The locking plate, base and daruma are made of JIS standard SUS316L surgical stainless steel,
Randoseru lock. The base has an upper surface, a peripheral wall extending downward from the periphery of the upper surface, and a box-shaped projection projecting upward from the center of the upper surface, and the locking plate is inserted into the front surface of the projection. The school bag lock according to claim 1, wherein a slit is formed. 3. The lock for a school bag according to claim 2, wherein the end of said base is formed in a semicircular shape in plan view. The lock unit includes a support plate, a pair of lock levers rotatably connected by the support plate, and a spring that biases the lock levers in a direction in which the tips thereof close,
The lock lever has an engagement portion that engages with the lock plate at its tip, an intermediate portion that is rotatably supported by the support plate, and a rear end that is an operation portion for unlocking,
The interval between the engaging portions of the left and right lock levers is narrower than the interval between the portions rotatably supported,
Openings are provided on the left and right side surfaces of the convex portion of the base to allow the operation portion to protrude,
The locking plate has teeth on both side edges that engage with the engaging portions of the lock unit,
The engaging portions are a pair of right and left engaging portions that allow the teeth of the lock plate to enter while opening the closed lock lever, and prevent the intruded teeth from disengaging. 3. A school bag lock according to claim 2, adapted to allow the release of the . 5. The lock for a school bag according to claim 4, wherein said teeth are arranged in rows of two or more teeth on each side.

Images