JP3150468U - Improved back ring - Google Patents

Abstract

[PROBLEMS] To reduce the height of a cushion portion provided on the front side of a back plate, and as a result, prevent the center of gravity from moving rearward and prevent the right and left of a school bag from shaking left and right during walking. Provide a school bag that facilitates. In an arm chamber provided inside a back ring body for fitting holes formed inside a peripheral edge of a locking rod 13 formed slightly larger than a fitting hole 8 provided in a back plate 2, The mounting substrate 11 is provided by forming the support column 11 having a pin hole, and the support port provided in the lower part of the pair of movable arms 19 is supported by the support provided in the arm chamber and is urged in the center direction by a spring. A latch receiving rod 33 that is mounted so as to be movable in the left-right direction and is slightly larger than the fitting hole 8 is formed in the peripheral portion, and a fan-shaped opening 34 that projects the upper portion of the movable arm outward is formed in the upper left and right The cover ring in which the press-fit pins 31 are established is formed at positions corresponding to the pin holes, and the back ring 10 in which the press-fit pins are pressure-bonded to the pin holes is accommodated in the fitting holes. [Selection] Figure 10

Description

  The present invention relates to an improved back ring for connecting a shoulder belt, which is attached in a fitting hole formed in a back plate provided in front of a school bag.

  Recently, in order to make it easier for school children to carry the backpack on and off the backpack, a fixture for connecting the backpack belt to the backplate of the backpack, i.e., the back ring, has a movable arm for connecting the backpack belt inside. Since it is mounted so that it can move left and right, the structure becomes complicated and the thickness inevitably increases. In addition, since the pair of movable arms that move left and right accommodates a return spring that biases in the center direction, when putting the shoulder on the shoulder belt, the movable arm is expanded outward to facilitate the insertion of the shoulder, The movable arm is returned to the center direction by a spring so that the shoulder belt contacts the shoulder of the schoolchild.

  Thus, the thickness of the conventional back ring is inevitably increased due to the complicated structure, and when the back ring is attached to the surface of the back plate, the surface portion of the back ring projects from the back plate surface to the front side. Will increase. As shown in FIG. 12, a belt fixture having a movable arm 19a for connecting a shoulder belt to the center of the front upper portion of the back plate 2a of the school bag 1, that is, a back ring 10a, has a bolt and nut 10b for passing through the back plate 2a. Along with the decorative piece 10c and the like, it is fixed to the front surface of the back plate 2a.

  Therefore, since the cushion part 4a to be mounted on both sides and the lower part on the front side of the back plate 2a includes the thickness X of the back ring, the thickness Y of the cushion part 4a attached to the front surface of the back plate 2a is the cushion part 4a. Unless the thickness (height) (Y = Z + X) is obtained by adding the normal thickness Z and the thickness X of the back ring, the surface of the back ring 10a may hit the back of the schoolchild. For this reason, the cushion portion 4a that is inevitably attached to the front surface of the back plate has a drawback that its thickness Y increases and becomes thicker.

  When the thickness of the school bag, that is, the thickness of the back plate portion increases, the position of the storage unit 1a for storing the textbook, notebook, etc. moves away from the back of the schoolchild, and as a result, the center of gravity of the school bag is rearward (the back of the school bag) Because it moves to the front side, the upper body of the schoolchild carrying the school bag will be walking backwards, and it will be difficult to walk because the school bag swings from side to side during walking. It had the problem that.

JP 2006-314396 A JP 2006-204752 A

When connecting a shoulder belt to a back ring with a movable arm attached to the center of the back of the back plate of the school bag, if the back ring is attached to the surface of the back plate, the back ring surface will be the thickness of the back ring from the back plate surface. Since the height increases only, the cushion part to be attached to the front of the back plate needs to be thickened so that the hard back plate and the surface part of the back ring do not hit the back of the schoolchild.
An object of the present invention is to make it possible to reduce the thickness of a cushion portion by fitting and attaching a main portion of a back ring in a fitting hole provided in a back plate.

  In order to achieve the above object, the present invention includes a back plate 2 provided through a fitting hole 8 having an arbitrary shape in the upper center, and a size larger than the fitting hole so as to fit inside the peripheral portion. A locking rod 13 is formed on the rear outer side of the back ring body 12 provided for fitting the joint hole, arm chambers 16 and 16 are provided inside the back ring body, and a plurality of support columns 15 having pin holes 14 are provided. , 15 are formed at the same height as the main body of the back ring, and the support posts 15a, 15a provided in the arm chamber are supported by bearings 22, 22 provided in the lower portion, and springs 23, 23 are provided. And a pair of movable arms 19 and 19 having belt connecting portions 20 and 20 on the upper side and a size larger than the fitting hole 8. And a latch receiving rod 33 which is paired with the latch rod 13 is formed on the peripheral edge, The fan-shaped openings 34 and 34 for projecting the upper part of the movable arm outwardly are provided on the left and right upper parts, respectively, and the suspension ring 35 is provided on the rear surface of the central upper part, and the press-fit pins 31 are respectively located at positions matching the pin holes. The back ring body 12 of the dorsal ring 10 in which the press-fit pins are press-fitted and fixed in the pin holes provided in the mounting substrate 11 in the fitting holes. The fitting holes are fixed by sandwiching both sides of the fitting hole 8 with the locking bar 13 and the locking bar 33. Further, the back ring body 12 has a recessed wall 12c having a flat surface 13a integral with the locking receiving rod 33 below the center lower part thereof, and is continuously formed on the back ring body 12, and the back plate 2 The mounting board in which the projecting piece 8a formed by projecting the lower center part of the fitting hole 8 provided in the upper part is engaged in the recessed wall, and the back ring body 12 is fitted in the fitting hole. 11 is characterized in that a cover plate 30 having a plurality of press-fit pins 31, 31 is pressed and fixed. Further, a hole provided in a protruding piece 8a engaged with the recessed wall on a support column 15b provided on a flat surface 13a located on the lower side of the recessed wall 12c provided at the lower center of the back ring body 12. 8b is fitted, and the press-fit pin 31 of the cover plate is press-fitted into and fixed to the pin hole of the column located in the hole. Furthermore, the press-fit pin 31 is provided with a plurality of biting blades formed by concentrically forming multi-stage pins on the circumferential surface in the axial direction, with the forward direction being inclined and the rear direction being orthogonal. To do. Further, it is characterized in that inclined surfaces 11a and 30a are provided on the peripheral edge of the surface of the locking rod 13 provided on the peripheral edge of the mounting substrate 11 and on the peripheral edge of the cover plate 30, respectively. To do.

  Since the present invention has the above-described configuration, when the mounting substrate 11 having the back ring body 12 formed in the same shape as the fitting hole is fitted into the fitting hole 8 provided in the back plate 2, the fitting is performed. The locking rod 13 formed slightly larger than the hole and provided outside the back ring body is locked and attached to the back side of the fitting hole. Since the back ring main body 12 is formed to have the same thickness as the back plate 2, the front surface of the back ring main body 12 becomes the same as the front surface of the back plate when fitted in the fitting hole 8. Can be fixed onto the mounting substrate 11.

  A plurality of pillars 15 each having a pin hole 14 are formed at the same height as the back ring main body 12 at an arbitrary position in the back ring main body 12 provided on the mounting substrate, and are respectively established at positions matching the pin holes. The cover plate 30 having the plurality of press-fit pins 31 can press-fit and fix the press-fit pins and the pin holes by a single pressing operation. The movable arms 19, 19 that are accommodated in the arm chambers 15, 15 of the mounting substrate and protrude outwardly from the upper part protrude outward from the fan-shaped openings 34, 34 provided on both sides of the upper part of the cover plate, respectively. Can move.

  The locking rod 13 provided outside the fitting hole 8 and provided on the peripheral edge of the mounting substrate and the locking rod 33 provided on the peripheral edge of the cover plate 30 are continuously formed without a notch in the middle. Therefore, it has strength. Therefore, the back ring main body is accommodated in the fitting hole in the mounting board and the cover body constituting the back ring, but the latching bar 13 of the mounting board and the latching bar 33 of the cover body are fitted. Since it is located outside the hole, the amount of protrusion to the outside of the back plate can be reduced.

  The present invention can reduce the height of the cushion portion provided on the front side of the back plate by housing the back ring main body, which is the main portion of the back ring, in the fitting hole 8 provided in the back plate. As a result, the thickness of the back plate increases like the conventional school bag and the center of gravity is prevented from moving backward, the school bag is made thinner and closely attached to the back of the schoolchild, and the right and left shaking of the school bag during walking is prevented. It has the advantage of preventing and walking easily.

It is a front view of the state which attached the back ring to the fitting hole provided in the back plate of the school bag. It is a front view of a back board. It is a front view of an attachment board. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is a front view of a movable arm. It is a rear view of a movable arm. It is CC sectional view taken on the line of FIG. It is a front view of a cover board. It is a rear view of a cover board. It is the sectional view on the AA line of FIG. 1 of the state which attached the back ring which consists of an attachment board | substrate and a cover board to a fitting hole. It is the enlarged front view which abbreviate | omitted a part of the state which attached the attachment board | substrate and the movable arm to the fitting hole. It is the side view which abbreviate | omitted a part of the state which attached the conventional back ring to the front upper center of the back plate of a school bag.

  The present invention attaches a back ring 10 in a fitting hole 8 provided penetrating in the upper center of the back plate 2 to reduce the portion of the back ring protruding from the back plate surface, thereby providing a cushion provided on the front of the back plate. The part could be formed low.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a state of being attached to a fitting hole provided in a back plate of a school bag, FIG. 2 is a front view of the back plate, and FIG. 4 is a cross-sectional view taken along line BB in FIG. 3, FIG. 5 is a front view of the movable arm, FIG. 6 is a rear view of the movable arm, FIG. 7 is a cross-sectional view taken along line BB in FIG. FIG. 9 is a rear view of the cover plate, and FIG. 10 is a cross-sectional view taken along the line AA of FIG. 1 in a state in which a back ring composed of a mounting substrate and a cover plate is attached to the fitting hole.
The back plate 2 provided at the front of the school bag has a storage portion for storing textbooks, notebooks, etc. on the back side (front), and fitted into a fitting hole 8 provided through the upper center of the back plate. The lower portions of the pair of shoulder belts 3 and 3 having upper portions connected to the back ring 10 are connected to belt connecting tools (not shown) attached to the left and right positions of the outer bottom surface of the school bag.

  The back plate 2 has elasticity on the surface of a core plate formed using a non-woven fabric impregnated with a synthetic resin material and cured, a hard paper obtained by impregnating a cardboard with a synthetic resin material, and a synthetic resin plate. Left and right cushion parts 4, 4 covering the surface with a surface material such as natural leather or synthetic leather. A recessed central cushion portion 5 having a lower height, a lower cushion portion 6 provided below, and a flat portion 7 provided at the upper center, and a fitting hole 8 having an arbitrary shape such as a substantially elliptical shape, for example. Is formed.

  Reference numeral 10 denotes a back ring composed of a mounting board 11 that accommodates a pair of movable arms 19 and springs 23 and a cover plate 30 that is attached to the front surface of the mounting board. By fitting and attaching in the hole 8, the main part of this back ring was accommodated in the fitting hole 8, and the protrusion part to the surface part of a backplate was decreased.

  The mounting substrate 11 constituting one of the back rings is made of light metal or hard synthetic resin, and is formed to be slightly larger than the fitting hole 8 provided in the back plate, and is formed inside the front peripheral edge of the mounting substrate. A back ring main body 12 to be fitted in the fitting hole 8 along the vertical direction is provided. The length of the back ring main body 12 is the same as the depth of the fitting hole 8, and the back ring main body 12 is not provided with a notch or the like in the middle so that the strength is not weakened. It is formed continuously.

  A flat locking bar 13 is continuously formed on the front surface of the peripheral edge of the mounting substrate outside the back ring main body 12, and the locking bar 13 is engaged with the rear surface peripheral part of the fitting hole 8. Stop. Furthermore, a plurality of support columns 15 and 15 provided through the pin holes 14 and 14 in the center at arbitrary locations on the front surface of the mounting substrate, for example, the upper and lower portions of both side portions and the central portion, respectively, are connected to the back ring main body 12. It is formed at the same height. The shape of the support column 15 is not necessarily cylindrical, but support columns 15a and 15a provided in arm chambers 16 and 16 described later are formed in a column shape. In addition, a recessed wall 12c that is recessed upward is formed integrally with the back ring body 12 at the lower center portion of the back ring body 12, and the engagement wall 12c is integrally formed on the outside of the recessed wall 12c. A flat surface 13a that is integral with the stop rod 13 is formed, and a support column 15 is provided in the flat surface 13a.

  Arc-shaped guide pieces 21 and 21 are formed on both sides of the middle part of the movable arm 19 provided on the upper portion of the belt-shaped belt connecting part 20 arranged in a substantially horizontal direction, and the guide pieces are stepped on the back surface of the movable arm. The movable arm moves left and right while the guide piece and the arc portion are guided by arc-shaped surfaces 12b and 12b provided on the inner surfaces of the upper side of the back ring main body 12 continuously by the arc portion 21a formed in a projecting manner. I have to do it.

  A bearing opening 22 provided at the lower center of the back surface of the movable arms 19 and 19 is inserted into columnar columns 15a and 15a located in the arm chamber so as to be pivotally supported. The arm chambers 16, 16 are accommodated so as to protrude upward from the outside of the chamber. Further, one end 23a of a spring 23 mounted in a spring groove 24 provided on the back surface of the movable arm concentrically with the bearing opening 22 is accommodated in a linear groove portion 24a provided on one side of the back surface of the movable arm. The other end 23b of 23 is protruded outwardly from a notch 24b provided on the other side of the linear groove portion, and is engaged with spring stops 12a and 12a provided on the side inner surfaces of the arm chambers 16 and 16, respectively. Each of the arms 19 and 19 is biased in the central direction.

  The cover plate 30 constituting the other of the back ring is made of light metal, hard synthetic resin, or the like, is substantially the same shape as the mounting board 11 and is slightly larger than the fitting hole 8, and is formed at the front end of the mounting board. In the back surface of the cover plate, at a position matching the pin holes 14, 14 existing in the pillars 15, 15 formed in plural or separately with the back ring main body 12 of the mounting substrate. Metal press-fit pins 31, 31 are respectively established. The length of the press-fit pin is formed to be substantially the same as the length of the pin hole 14, and a plurality of biting blades formed in a multi-stage concentrically on the axial circumferential surface of the pin include the pin It has a configuration in which it cannot escape when it is press-fitted into the hole 14. That is, the biting blade is formed on an inclined surface in the forward direction and is formed on an orthogonal surface in the backward direction. Furthermore, a slightly larger diameter head 32 provided at the rear end of the press-fit pin 31 is formed by being embedded in a member forming the cover plate so as not to be exposed from the surface of the cover plate.

  On the inner side of the peripheral edge of the cover plate 30, that is, on the surface in contact with the front peripheral edge of the fitting hole 8, a lock receiving bar 32 that forms a pair with the lock bar 13 is formed. Fan-shaped openings 34 and 34 are formed on both sides of the upper portion so as to project obliquely on the front side of the cover plate (FIG. 10). Therefore, the upper parts of the movable arms 19, 19 accommodated in the arm chambers 16, 16 of the mounting substrate can project leftward and rightward from the back ring.

  The suspension ring 35 is attached to the upper center rear surface (inner surface) side of the cover plate 30 so that the suspension ring 35 can be turned to the front side of the cover plate 30 so as to be rotatable or vertically movable. The hanging ring 35 is for hanging on a hook or the like provided on a wall surface of a classroom or the like when the school bag is not used.

  The other embodiment in which the fitting hole 8 is deformed will be described. As shown in FIG. 2, the lower center portion of the fitting hole 8 provided in the back plate 2 is projected upward to project the protruding piece 8a. A concave wall 12c is formed continuously at the center lower portion of the back ring body 12 of the mounting substrate, and a flat surface 13a continuous with the locking rod 13 is provided outside the concave wall 12c. is there. Since the flat surface 13a is provided with the support column 15 having the pin hole 14, the upper portion of the protruding piece is engaged with the recessed wall 12c, and the hole portion 8b is provided on the flat surface. The cover plate 30 is inserted into the support column 15 and the protruding piece 8a is sandwiched and fixed between the flat surface 13a of the mounting substrate and the back surface (inner surface) of the cover plate 30.

  As described above, the locking rod 13 provided at the peripheral edge of the mounting substrate 12 formed to be slightly larger than the fitting hole 8 provided in the back plate 2, and the cover plate 30 formed to be slightly larger than the fitting hole. Both side surfaces of the peripheral edge portion of the fitting hole of the back plate are sandwiched by the locking receiving rods 33 provided on the peripheral edge portion. Further, the protruding piece 8 a forming a part of the back plate is sandwiched between the flat surface 13 a of the mounting substrate and the back surface of the cover plate 30, and the protruding piece 8 a is provided at the lower center of the back ring main body 12. The back plate 2 and the back ring 10 are engaged with each other by engaging the hole 8b provided in the protruding piece with the support column 15 provided on the flat surface 13a. Since the back ring main body 12 fitted in the fitting hole 8 and the hole 8b are fixed at two positions of the support column 15, the back ring fitted in the fitting hole does not move freely in the fitting hole. Can be fixed.

  Inclined surfaces 11a and 30a are formed on the rear side (front side) peripheral part of the mounting substrate 11 and the front side (front side) peripheral part of the cover plate 31, respectively, so that the outer peripheral part is thin. Thus, the end portion is formed in an arc shape, thereby reducing a step generated between the back plate 2 sandwiched by the mounting substrate 11 and the cover plate 30. In this way, the main portion 12 of the back ring is accommodated in the fitting hole 8, and is sandwiched between the locking rod 13 of the mounting substrate 11 and the locking receiving rod 33 of the cover plate 30 on both sides of the fitting hole. ing. As described above, since the main portion of the back ring is accommodated in the fitting hole 8, the cushion portion to be mounted on the front surface of the back plate 2 does not need to be increased in thickness, and the cushion portion is formed thin. be able to.

  Next, the operation of this embodiment will be described. When the back ring body 12 of the mounting board is fitted into the fitting hole 8 of the back plate 2, the locking rod 13 provided on the outside of the back ring body is provided. The front end of the back ring main body 12 is flush with the front surface of the back plate 2. Next, the movable arms 19 and 19 having the belt connecting portion 20 are accommodated in the arm chambers 15 and 15 inside the back ring main body, and the spring provided concentrically with the bearing opening 22 provided at the lower back of the movable arm. One end 23a of the spring 23 mounted in the groove 24 is hooked in the linear groove portion 24a of the movable arm, and the other end 23b of the spring is hooked on the spring stopper portions 12a and 12a provided in the arm chamber, The movable arm is biased in the center direction, and the bearing opening 22 is supported by the columns 15a, 15a in the arm chamber so as to be movable in the left-right direction.

  A plurality of press-fit pins are pinned by crimping the mounting substrate 11 having the support posts 15 and the cover plate 30 having press-fit pins 31 and 31 that match the pin holes 14 and 14 provided in the support posts. Since it can be press-fitted into the hole and fixed, and the mounting operation of the back ring 10 into the fitting hole 8 of the back plate can be completed at once, the operation is simple and extremely convenient.

  When force in the pulling direction is applied to the press-fit pin 31 press-fitted into the pin hole 14, the diameter of the press-fit pin 31 is 1 mm and the diameter of the head of the pin is 5 mm. Therefore, it is possible to withstand a force of 70 to 100 kg by increasing the diameter of the pin to 2 to 3 mm. When the cover plate 30 is fixed to the front surface of the mounting substrate 11 by pressure, the fitting is performed. The back ring main body 12 housed and mounted in the hole 8 is sandwiched between both side surfaces around the fitting hole 8 by the locking bar 13 of the mounting board and the locking bar 33 of the cover plate. Can be installed.

  Further, a projecting piece 8a is provided upward from the lower center portion of the fitting hole 8 provided in the back plate 2, and in a recessed wall 12c provided continuously at the center lower portion of the back ring body 12 of the mounting board. The protruding piece piece 8a is provided on a support column 15 which engages the protruding piece piece, abuts the back surface of the protruding piece piece 8a on the flat surface 13a, and has a pin hole 14 provided on the flat surface 13a. When the hole 8b is fitted and the cover plate 30 is crimped from the front side of the mounting board 11, the back ring body 12 of the mounting board is fitted into the fitting hole of the back board, and the hole A support 15 provided on the mounting board is fitted in 8b to be attached to the back plate, and the back ring is fixed at the two locations described above. Therefore, the back ring 10 that is sandwiched between the latch of the mounting substrate and the latch receiving plate of the cover plate and accommodated in the fitting hole can be fixed without floating in the fitting hole.

2 Back plate 8 Fitting hole 10 Back ring 11 Mounting substrate 12 Back ring main body 13 Locking rod 14 Pin hole 15 Post 16 Arm chamber 19 Movable arm 20 Belt connecting part 22 Bearing port 23 Spring 30 Cover plate 31 Press-fit pin 33 Lock Receiving ring 34 Opening 35 Suspended ring

Claims (5)

A back plate 2 provided through a fitting hole (8) having an arbitrary shape in the upper center;
A locking collar (13) is formed outside the rear portion of the back ring body (12) which is formed to be slightly larger than the fitting hole and is provided inside the peripheral edge for fitting hole fitting, Each provided with an arm chamber (16, 16), and a mounting substrate (11) formed by forming a plurality of columns (15, 15) having pin holes (14) at the same height as the back ring body,
The support shafts (15a, 15a) provided in the arm chamber are supported by bearings (22, 22) provided in the lower portion and biased in the center direction by springs (23, 23) so as to be movable left and right. A pair of movable arms (19, 19) having a belt connecting portion (20, 20) at the top,
A latch receiving bar (33) which is formed to be slightly larger than the fitting hole (8) and forms a pair with the locking bar (13) is formed on the peripheral edge, and the upper part of the movable arm is protruded outward. The fan-shaped openings (34, 34) are provided on the upper left and right sides, respectively, and a suspension ring (35) is provided on the back of the upper center, and press-fit pins (31, 31) are established at positions corresponding to the pin holes, respectively. The cover body (30)
A back ring body (12) of a back ring (10) in which the press-fit pins are press-fitted into and fixed to the pin holes provided in the mounting substrate (11) is fitted into the fitting hole, An improved back ring characterized by sandwiching and fixing both sides of the fitting hole (8) between the (13) and the locking receiving rod (33).   The back ring main body (12) has a concave wall (12c) having a flat surface (13a) integral with the locking catch (33) below the lower center portion of the back ring main body (12). The projecting piece piece (8a) formed by projecting upward the lower center portion of the fitting hole (8) provided in the back plate (2) is engaged with the recessed wall, and the fitting is performed. The cover plate (30) having a plurality of press-fit pins (31, 31) is fixed to the mounting substrate 11 in which the back ring main body (12) is fitted in the hole by pressure bonding. Improved back ring as described.   A protruding piece piece engaged with the recessed wall by a column (15b) provided on a flat surface (13a) located below the recessed wall (12c) provided at the lower center of the back ring body (12). The hole (8b) provided in (8a) is fitted, and the press-fit pin (31) of the cover plate is press-fitted into and fixed to the pin hole of the column located in the hole. The improved back ring according to claim 1 or 2.   The press-fit pin (31) is provided with a plurality of biting blades provided on an inclined surface in the forward direction of a pin formed in a multi-stage concentrically on the axial circumferential surface and on an orthogonal surface in the rear surface direction. The improved back ring according to any one of claims 1 to 3.   An inclined surface (11a, 30a) is provided on the peripheral edge of the surface of the locking rod (13) provided on the peripheral edge of the mounting substrate (11) and on the peripheral edge of the cover plate (30). The improved back ring according to claim 1, wherein:

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