JP2006006588A - Gear for toy with cushioning function and gap adjusting mechanism in axial direction thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear for toys, capable of extending the life of a driving mechanism of the toy including a driven side gear engaged with the gear even if incorporated in the driving mechanism of a toy such as an air-gun and operated at a high rotation speed, together with a gap adjusting mechanism in the axial direction thereof. <P>SOLUTION: The gear for toys has one gear with a toothless part and another gear, which are coaxially superimposed and connected with a cushioning mechanism interposed in the axial direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  Even if the special gear that intermittently transmits the power from the driving source to the driven side is incorporated in the toy driving mechanism such as an air gun and rotated at a high rotational speed, the toy driving mechanism The present invention relates to a toy gear that can extend its life and an axial clearance adjusting mechanism thereof.

  As an air gun which is one of toys, one which reciprocates a piston in a cylinder and fires a bullet each time is known. For example, after using a drive source such as a motor to move the piston back in the cylinder against the spring force, it is moved forward in the cylinder instantaneously by the repulsive force of the spring. An air gun that fires bullets is known (Patent Document 1).

  In the air gun described in Patent Document 1, as shown in FIGS. 8 and 9, the rotation of the motor 110 as a driving source is intermittently applied to the rack teeth 105 provided at the lower portion of the piston 103 between the motor 110 and the piston 103. For this purpose, a special toy gear is incorporated as a piston drive gear 108. As shown in FIG. 11, such a special toy gear is defined as a gear in which two gears 108A and 108B are coaxially overlapped to intermittently transmit power from the drive source side to the driven side. Also called intermittent gear.

  8 and 9, the piston driving gear 108 shown at the center is a special toy gear, and a toothless portion 107 is formed on one gear 108A. In the conventional special toy gear, one gear 108A on which the toothless portion 107 is formed and the other gear 108B are coaxially overlapped and integrated by a connecting pin 108C interposed in the axial direction.

  The piston driving gear 108 meshes with the other gear 108B and the reduction gear 109 that inputs the power of the motor 110, and the one gear 108A having the toothless portion 107 and the rack 105 under the piston 103 are intermittently connected. Engage with. The operation when this special toy gear is incorporated in the air gun drive mechanism is as follows.

  When the motor 110 shown in FIG. 8 is rotated, the rotation is transmitted to the piston driving gear 108 via the reduction gear 109 and the like, and the gear teeth 106 and the rack teeth 105 of the piston driving gear 108 are engaged with each other. The piston 103 moves backward against the spring force. When further rotated, as shown in FIG. 9, the toothless portion 107 of the piston driving gear 108 reaches the lower portion of the piston 103, and immediately after that, the meshing is lost and the piston 103 is instantaneously moved by the repulsive force of the compression spring 104. Advance. Each time this process is repeated, the sucked air is compressed and ejected from the ejection port 101 of the cylinder 102, and the bullet 121 stopped just before that is fired.

  The compression spring 104 has a strong spring force to push out the piston 103 and is received by a spindle 111 fixed to the air gun body 120. On the other hand, the piston 103 is provided with an O-ring 112 at the front thereof to maintain airtightness in the cylinder.

  Here, in the drive mechanism of the piston 103 described in Patent Document 1, as shown in detail in FIG. 10, the first teeth 105 </ b> A of the rack provided at the lower portion of the piston have a higher tooth height than the other rack teeth, and the piston reliably The first gear 106A of the driving gear 108 is captured.

In the conventional special toy gear, as shown in FIG. 11, two gears 108 </ b> A and 108 </ b> B are coaxially overlapped and integrated with a connecting pin 108 </ b> C interposed in the axial direction as a driving mechanism for the piston 103. It has been incorporated.
Japanese Utility Model Publication No. 7-22635

  However, in the conventional driving mechanism of the piston 103, when the piston driving gear 108, which is a special toy gear, is operated at a high rotational speed in order to increase the number of bullets fired per unit time, the toy driving mechanism There is a problem that the life of the battery becomes extremely short.

  This problem will be described with reference to FIG. 10A to 10C are schematic views showing states before and after meshing in which the first teeth 106A of the piston driving gear 108 catch the first teeth 105A of the rack provided at the lower portion of the piston.

  FIG. 10A shows a state in which the piston 103 is waiting at the piston standby position by the spring force of the compression spring 104, and FIG. 10B shows that the piston driving gear 108 has been rotated and formed at the lower part of the piston. The state when it collides with the 1st tooth | gear 105A of a rack is shown. FIG. 10C shows the rotational force from the motor 110 and the moment of inertia of each part from the motor 110 to the piston driving gear 108, and the piston 103 drive mechanism has no force escape field. 103 shows a state in which retreating has started. At this time, a great amount of strain is accumulated in the first teeth 105A of the rack formed in the lower portion of the piston and the first teeth 106A of the piston driving gear 108.

  FIG. 10D shows a state in which the first tooth 105A of the rack formed at the lower portion of the piston is damaged due to the accumulation of a large amount of strain, and the toy drive mechanism cannot perform its function at an early stage. Even if such damage does not occur, since a large amount of strain is repeatedly applied to the first teeth 105A of the rack formed at the lower part of the piston, the toy drive mechanism cannot perform its function early due to softening due to heat generation. There is.

  The reason why such a problem occurs in the air gun as a toy is that when the piston driving gear 108 rotates and the first teeth 106A of the piston driving gear 108 start to engage with the first teeth 105A of the rack formed under the piston. In addition to the rotational force from the motor 110 and the moment of inertia of each part from the motor 110 onward to the piston drive gear 108, the drive mechanism of the piston 103 does not have a force escape place, so a large impact is repeatedly applied to the teeth that mesh with each other. It was found that the influence of this was great. In an air gun as a toy, the material of the rack provided under the piston is usually made of resin, and the material of the piston driving gear 108 is made of metal.

  In other words, in order to increase the number of bullets fired per unit time, for example, the number of bullets fired at 900 shots per minute is set to 1500 bullets per minute as in a survival game for competitions, and one bullet is fired. When the piston driving gear 108 is operated at a high rotational speed with an energy of 1 J (joule), the moment of inertia of each component of the toy drive mechanism, including the moment of inertia of the gear itself, increases rapidly, and the motor Since the toy drive mechanism from 110 onwards to the piston drive gear 108 has no place for force to escape, a large impact is repeatedly applied to the teeth that are initially engaged. As a result, there is a problem that the life of the drive mechanism of the toy becomes extremely short, so that the number of bullets is generally limited.

  In addition, the air gun incorporating the piston drive gear 108 in the drive mechanism is used with a bullet firing number of 1500 shots per minute, as in a survival game for competitions, with one bullet firing energy increased to 1 J (Joule). In this case, even if the material of the gear meshing with the piston driving gear 108 is changed to a material having high strength and toughness, a large impact is repeatedly applied to the teeth that mesh with each other first, so that the driven side gear functions. The number of bullets fired until it can no longer be fulfilled is insufficient.

  In addition, since the drive mechanism of the piston 103 from the motor 110 to the piston drive gear 108 does not have a force escape place, a special gear that intermittently transmits the power from the drive source to the driven side is used. When it is incorporated into a drive mechanism and rotated at a high rotational speed, an excessive force is applied to each part constituting the toy drive mechanism, which may shorten the life of the part.

  Even when a special gear that intermittently transmits power from a driving source to a driven side is incorporated in a toy driving mechanism such as an air gun and rotated at a high rotation speed, the gear is engaged with the gear. An object of the present invention is to provide a toy gear including a driving side gear that can extend the life of a toy drive mechanism and an axial clearance adjustment mechanism thereof.

  The present invention relates to a toy gear incorporated in a toy drive mechanism and used to intermittently transmit power from a drive source to a driven side, and has one gear and the other gear having a toothless portion. Are toy gears that are overlapped coaxially and connected by an impact relaxation mechanism interposed in the axial direction. This intermittent gear is also referred to as an intermittent gear with an impact relaxation function.

  The present invention is also a toy gear incorporated in a toy drive mechanism and used as a drive gear, wherein one gear and the other gear are coaxially overlapped and connected by an impact relaxation mechanism interposed in the axial direction. It is a toy gear characterized by being made.

  This gear is also simply referred to as a gear with an impact relaxation function.

  Further, in the present invention, when the intermittent gear with an impact relaxation function or the gear with the impact relaxation function is incorporated as a drive gear in a toy drive mechanism, the shaft is inserted in a floating state, and a compression spring is attached to the shaft. It is an axial clearance adjustment mechanism for a toy gear, which is assembled between bearings provided on the toy body in a state.

  According to the present invention, when the intermittent gear with an impact mitigating function is incorporated as a piston driving gear, the shaft is inserted in a floating state and incorporated between bearings provided on the toy body, and the piston of the air gun is driven. Mechanism.

  Further, the present invention is an air gun characterized in that the gear with the impact relaxation function is incorporated between bearings provided in a toy body in the middle of a path from a power source to a piston driving gear with its shaft inserted in a floating state. It is a drive mechanism of a piston.

  In addition, when the intermittent gear with an impact relaxation function is incorporated as a piston driving gear, its shaft is inserted in a floating state, and is incorporated between bearings provided on a toy body, and the gear with an impact relaxation function is in an idle state. The air gun piston drive mechanism is inserted between the bearings provided in the toy body in the middle of the path from the power source to the piston drive gear.

  That is, the intermittent gear with an impact relaxation function and the gear with an impact relaxation function according to the present invention are both toy gears that are used by being incorporated in a toy drive mechanism.

  According to the toy gear according to the present invention, even when the toy drive mechanism such as an air gun is incorporated and operated at a high rotational speed, the life of the toy drive mechanism including the driven side gear meshing with the gear is improved. Can be extended.

  According to the axial clearance adjustment mechanism for a toy gear according to the present invention, it can be easily incorporated into a toy drive mechanism such as an air gun and can be a stable toy drive mechanism.

  First, the toy gear according to the first embodiment will be described with reference to FIGS. FIG. 1 is a schematic plan view showing an intermittent gear 1 with an impact relaxation function according to the first embodiment, and FIG. 2 is a sectional view taken along line XX of FIG.

  The toy gear shown in FIGS. 1 and 2 is a gear for intermittently transmitting power from a driving source to a driven side, that is, an intermittent gear, and the two gears 2 and 3 are coaxially overlapped. An intermittent gear 1 with an impact relaxation function, which is connected by an impact relaxation mechanism interposed in the axial direction. The structure of the impact relaxation mechanism interposed in the axial direction will be described later.

  Here, the shaft of the intermittent gear 1 with an impact relaxation function is inserted in a floating state with respect to the shaft hole when the shaft is incorporated into a toy drive mechanism. 1 and 2, reference numeral 9 denotes the shaft core 9 of the intermittent gear 1 with an impact relaxation function that is inserted into the shaft hole.

  In the intermittent gear 1 with an impact relaxation function according to the first embodiment, a toothless portion 7 is formed on one gear 2 and a predetermined number of gear teeth 6 are formed. The other gear 3 has no toothless portion, and a predetermined number of gear teeth 8 that mesh with the teeth of the drive source side gear are formed. For example, one gear 2 has a total of 30 teeth, of which 14 are scraped off to form a toothless portion 7 and the remaining 16 gear teeth 6 mesh with the teeth of the drive source side gear. That is, one gear 2 is formed with a predetermined number of gear teeth 6 that mesh with the driven gear when the intermittent gear 1 with an impact mitigating function is incorporated into the toy drive mechanism.

  Accordingly, when the shaft is inserted in the idle state in the intermittent gear 1 with an impact relaxation function and is incorporated between the bearings provided on the toy body, the driven gear is driven within a range in which a predetermined number of gear teeth 6 are formed. Transmits power from the source. On the other hand, the intermittent gear 1 with an impact relaxation function does not mesh with the teeth of the driven side gear within the range of the toothless portion 7 with respect to the driven side gear, and rotates in a so-called idling state.

  In short, the intermittent gear 1 with an impact relaxation function according to the first embodiment is a toy gear incorporated in a toy drive mechanism and used to intermittently transmit power from a drive source to a driven side. The gear for toy is formed by superimposing one gear having a toothless portion and the other gear on the same axis and connected by an impact relaxation mechanism interposed in the axial direction.

  Since the intermittent gear 1 with an impact relaxation function according to the first embodiment has a structure connected by an impact relaxation mechanism interposed in the axial direction, the shaft is inserted into the toy drive mechanism in a floating state, There is an impact mitigating function for mitigating an impact at the start of meshing between the gear teeth 6 and the driven gear teeth in a use state incorporated between bearings provided on the toy body.

  The impact mitigating mechanism interposed in the intermittent gear 1 with an impact mitigating function according to the first embodiment will be described in detail.

  The impact mitigation mechanism shown in FIG. 1 and FIG. 2 is a through hole having a circular cross section formed through the gear 2 in the axial direction, and a cylinder inserted into the through hole and extending from the gear 3 in the axial direction. It consists of a pressing member 5 with a clearance-like clearance regulating member 5B and an impact buffering material 4. The shock absorbing material 4 has a ring shape, and is inserted in a compressed state between the pressing member 5 that covers the cylindrical gap regulating member 5B and the through hole having a circular cross section.

  In this case, the gear 2 having the toothless portion 7 has through-holes having a circular cross section formed at equal intervals in three circumferential directions in the axial direction. On the other hand, the gear 3 is formed with a female screw corresponding to the position of the through hole, and the pressing member 5 is screw-coupled with the two-stage cylindrical gap regulating member 5A and the ring-shaped impact cushioning material 4 attached. And fixed to the gear 3. In this case, the pressing member 5 was a countersunk screw.

  Further, the gap G is regulated by covering the pressing member 5 with a two-stage cylindrical gap regulating member 5B. The gap G corresponds to the compression amount of the shock absorbing material 4 at the rotational position when the intermittent gear 1 with an impact mitigating function according to the first embodiment is used as a piston driving gear in the air gun drive mechanism. Equivalent to.

  As the shock absorbing material 4, a rubber O-ring can be used. For example, in a toy drive mechanism such as an air gun, the shock-absorbing material 4 having heat resistance may be used. This is because the shock-absorbing material 4 is compressed in a short time by the pressing member 5 that covers the cylindrical gap regulating member 5B and then returns to its original shape and then generates heat to repeat 900 times per minute. When a rubber O-ring is used as the shock absorbing material 4, the gap G corresponding to the compression amount of the shock absorbing material 4 at the position in the gear rotation direction is the thickness of the O-ring, that is, the outer diameter and the inner diameter. Is preferably set to 30% or less of the difference from the above, because the amount of heat generated by the shock absorbing material 4 can be suppressed and the impact mitigating action can be sustained.

  However, the shock-absorbing material 4 is not limited to the rubber O-ring, and is repeatedly compressed in a short time by the pressing member 5 that covers the cylindrical gap regulating member 5B, and then returns to its original shape. Even in such a case, it is possible to select an appropriate material that can maintain the impact mitigating action of mitigating the impact with a small change in shape.

  The intermittent gear 1 with an impact relaxation function shown in FIGS. 1 and 2 is suitable for use in a toy drive mechanism. In that case, the shaft of the intermittent gear 1 with an impact relaxation function can be inserted in a floating state and assembled between the bearings provided on the toy body.

  Next, the operation of the intermittent gear 1 with an impact relaxation function according to the first embodiment will be described with reference to FIG.

  FIG. 3 is a schematic diagram of a use state in which the intermittent gear 1 with an impact relaxation function is incorporated as a piston driving gear in an air gun drive mechanism, and the first tooth 6 </ b> A of the gear tooth 6 and the rack formed under the piston 11. It is a figure which shows the state before and behind a meshing start in order of (a), (b), (c), (d).

  Here, the gear teeth 6 are formed on the upper gear 2 in FIG. 3, while the pressing member 5 is provided with an impact buffer 4 and a cylindrical gap regulating member 5B on the lower gear 3 (not shown in FIG. 3). It is fixed in the attached state. In FIG. 2, the gap between the head of the pressing member 5 and the through hole having a circular cross section is formed between the pressing member 5 that covers the cylindrical gap regulating member 5 </ b> B and the through hole having a circular cross section. The same as the gap G.

  Accordingly, when the pressing member 5 with the cylindrical gap regulating member 5B fixed to the gear 3 is used as a piston driving gear in the air gun driving mechanism, when the meshing of the gear teeth 6 and the rack which is the driven side gear starts. , The shock absorbing material 4 has a role of compressing the gap G at the position in the gear rotation direction, and after the compression of the shock absorbing material 4 is completed, while the power is transmitted to the driven gear, The head is in contact with the inner surface of the through hole formed in the gear 2, and the large diameter portion of the cylindrical clearance regulating member 5B is in contact with the inner surface of the through hole, whereby the power input to the gear 3 is transmitted to the gear 2. Have a role to play.

  In FIG. 3, reference numeral 21 denotes a compression spring inserted into the piston 11.

  Explaining in the order of (a), (b), (c), (d), FIG. 3 (a) shows the state when the piston 11 is waiting at the piston standby position by the spring force of the compression spring 21. The first teeth 6A of the gear teeth formed on the gear 2 are positioned behind the first teeth 12A of the rack teeth in the rotational direction. FIG. 3B shows a state where the piston driving gear 1 has been rotated and the first tooth 6A of the gear tooth has caught the first tooth 12A of the rack tooth. In FIG. 3B, the gear 2 temporarily stops at that position.

  In FIG. 3C, the shock absorbing material 4 is compressed by the gap G at the gear rotation direction position by the pressing member 5 fixed to the lower gear 3 (not shown), and the shock absorbing material 4 finishes absorbing a certain amount of shock. Indicates the state at the time. That is, between FIG. 3B and FIG. 3C, the rotation of the gear 2 is stopped, and the shock absorbing material 4 is compressed by a predetermined amount at the position of the gear rotation direction by the pressing member 5 fixed to the lower gear 3. Thus, it is possible to absorb the moment of inertia due to each component from the motor that is the driving source to the intermittent gear 1 with an impact relaxation function. In the meantime, moments with respect to the rotational direction are gradually accumulated, and the piston 11 starts to retract as shown in FIG.

Thus, when the intermittent gear 1 with an impact relaxation function is incorporated as a piston driving gear in the toy drive mechanism, at the start of meshing when the first tooth 6A of the gear tooth catches the first tooth 12A of the rack tooth. By compressing the shock-absorbing material 4 by a predetermined amount at the position of the gear rotation direction, the shock due to the moment of inertia of each component constituting the drive mechanism of the piston 11 including the moment of inertia of the gear itself is absorbed, After the buffer material 4 is compressed by a predetermined amount, power is transmitted from the gear 3 to the gear 2 without the impact buffer material 4 being interposed.

  That is, after absorbing a certain amount of moment of inertia by the shock absorbing material 4, the head of the pressing member 5 contacts the inner surface of the through-hole formed in the gear 2 while transmitting power to the rack of the piston 11. In addition, since the power input to the gear 3 is transmitted to the gear 2 when the large diameter portion of the cylindrical gap regulating member 5B is in contact with the inner surface of the through hole, the power transmission loss due to the shock absorbing material 4 is reduced. The power can be transmitted from the gear 3 to the gear 2.

  Therefore, according to the intermittent gear 1 with an impact mitigating function according to the first embodiment, even if it is incorporated in a toy drive mechanism such as an air gun and operated at a high rotational speed, it includes a driven gear that meshes with the gear. The life of the toy drive mechanism can be extended.

  Further, according to the intermittent gear 1 with an impact relaxation function according to the first embodiment, after the impact buffer material 4 is compressed by a predetermined amount, the shock buffer material 4 is transmitted while power is transmitted to the driven gear. There is also an advantage that power transmission loss due to can be suppressed.

  Although the intermittent gear 1 with an impact relaxation function according to the first embodiment has been described above, the present invention is not limited to the toy gear shown in FIGS. For example, the intermittent gear 10 with an impact relaxation function according to the second embodiment as shown in FIGS.

  In this case, a through-hole having a circular cross section and a cross-shaped groove are formed in the central portion of the gear 2 so as to penetrate in the axial direction, while the through-hole having a circular cross section formed in the spur gear 2 is formed in the gear 3. A protrusion and a pressing member 5 that can be inserted with a gap formed in a cross-shaped groove are extended.

  However, the pressing member 5 was fixed to the gear 3 with a fastening bolt 5A in a state where the shock absorbing material 4 was mounted. Further, the shock absorbing material 4 is compressed in a gap formed by inserting a protrusion and a pressing member 5 extending in the gear 3 into a through-hole having a circular cross section and a cross-shaped groove formed in the gear 2. It is installed. The gap G corresponding to the compression amount of the shock-absorbing material 4 at the rotational position when the intermittent gear 10 with the impact relaxation function according to the second embodiment is incorporated in a toy drive mechanism is used in the first embodiment. It is preferable to set similarly to the intermittent gear 1 with an impact relaxation function according to the embodiment.

  The intermittent gear 10 with an impact relaxation function according to the second embodiment as shown in FIGS. 4 and 5, for example, has one gear 2 having a toothless portion 7 and the other gear 3 overlapped on the same axis, thereby shock absorbing. The pressing member 5 on which the material 4 is mounted can be assembled by attaching it to the gear 3 with fastening bolts 5A.

  According to the intermittent gear 10 with an impact relaxation function according to the second embodiment, when used as a piston driving gear in an air gun drive mechanism, it is the same as the intermittent gear 1 with an impact relaxation function according to the first embodiment. It is possible to exert various actions and effects.

  In FIG. 6, when the intermittent gear 1 with an impact relaxation function according to the first embodiment is incorporated as a piston driving gear in the air gun drive mechanism, its shaft is inserted in a floating state, and the compression spring 16 is inserted into the shaft. The case where it mounts between the bearings 13 provided in the air gun main body 20 in the mounted state is shown.

  In FIG. 6, a clearance adjusting ring 14, a bush 15, and a compression spring 16, which are also referred to as shims, are attached in order from the top to the shaft of the intermittent gear 1 with an impact relaxation function. Is mounted, and the intermittent gear 1 with an impact relaxation function and the reduction gear 17 are pressed in the same direction by a spring force. The reduction gear 17 includes an integrated small gear 18 and a large gear 19.

  According to the axial clearance adjustment mechanism of the toy gear as shown in FIG. 6, the shim adjustment work of the intermittent gear 1 with an impact relaxation function is unnecessary, so that the assembling work can be easily performed, and the compression spring Since the intermittent gear 1 with an impact mitigating function incorporated by 16 is always kept at a constant pressure in one direction, there is no backlash in the thrust direction of the intermittent gear 1 with an impact mitigating function, and the toy drive mechanism is stabilized. There is also the following effect.

  For example, when a radial ball bearing is used as the bearing 13 in the air gun body 20, the radial / thrust clearance of the ball bearing can be eliminated at the same time. it can. Further, when an oilless metal is used as the bearing 13 for the air gun body 20, backlash in the thrust direction of the intermittent gear 1 with an impact relaxation function can be eliminated, so that resonance can be suppressed.

  On the other hand, when the conventional axial clearance adjustment mechanism as shown in FIG. 7 is employed, since the compression spring 16 is not mounted, the shim adjustment work is sufficiently performed and the intermittent gear 1 with an impact relaxation function rotates smoothly. It is necessary to incorporate it with an appropriate thrust direction clearance so that it can be performed. For example, when the shim adjustment work is insufficient, the risk that the intermittent gear 1 with an impact relaxation function and the reduction gear 17 are in contact with each other cannot be excluded.

  Such a shim adjustment work is required in the case of a toy, while there is an appropriate thrust direction clearance, while the distance between the bearings 13 varies greatly due to individual differences in the air gun body 20 that houses the drive mechanism of the toy. However, if the thrust direction clearance becomes excessive accordingly, the gears come into contact with each other on the side surface or the toy malfunctions. In the case of an air gun, which is a toy, the proper clearance is 0.02 mm, while the gap adjustment ring 14 is at least 0.1 mm thicker than the proper clearance, so the shim adjustment work must be performed sufficiently. However, there is a case where the backlash in the thrust direction of the intermittent gear 1 with an impact relaxation function cannot be eliminated. In the conventional axial clearance adjusting mechanism, an appropriate number of clearance adjusting rings 14 are stacked to reduce the backlash in the thrust direction of the intermittent gear 1 with an impact relaxation function, and therefore the compression spring 16 is not mounted.

  The intermittent gear 1 or 10 with an impact relaxation function according to the first and second embodiments described above can be used as a piston driving gear for an air gun as shown in FIGS. It can also be applied as a gear for use.

  By the way, when it is difficult to incorporate the intermittent gear 1 or 10 with an impact mitigating function according to the first and second embodiments as a driving gear of a toy driving mechanism, the conventional one having a toothless portion remains as it is. A toy gear in which the other gear and the other gear are coaxially integrated is incorporated as a driving gear, and together with this intermittent gear, one gear and the other gear are coaxially overlapped and interposed in the axial direction. A gear with a shock mitigating function, which is connected by an impact mitigating mechanism, can be used as a toy drive mechanism in which the shaft is inserted in a floating state and incorporated between bearings provided on the toy body. A gear with an impact mitigation function in which one gear and the other gear are coaxially overlapped and connected by an impact mitigation mechanism interposed in the axial direction can be similarly incorporated as a drive gear of a toy drive mechanism. Even in such a case, the life of the drive mechanism of the toy including the driven side gear meshing with the gear can be extended, so that one gear and the other gear are coaxially overlapped, and the impact interposed in the axial direction. A gear with an impact relaxation function that is connected by a relaxation mechanism is also useful.

  Of course, if the intermittent gear 1 or 10 with impact reducing function according to the first or second embodiment can be incorporated as a drive gear in the toy drive mechanism, the shaft is inserted in a floating state and a bearing provided on the toy body. The toy drive mechanism is built in between the bearings provided in the toy body by inserting the shaft with the shock relaxation function together with the intermittent gear 1 or 10 with the shock relaxation function and inserting the shaft in the idle state. It is also suitable.

  An intermittent gear 1 with an impact mitigating function shown in FIGS. 1 and 2 was incorporated in an air gun drive mechanism, and a bullet firing experiment was conducted to obtain an example of the present invention. In assembling the intermittent gear 1 with an impact relaxation function into the air gun drive mechanism, the shaft was inserted in a floating state and assembled between the bearings 13 provided on the toy body 20 as shown in FIG. The air gun is an electric air gun that uses an electric motor as a drive source, and the rack of the piston is made of resin.

The gear 2 that formed the edentulous portion 7 scraped off 14 of the 30 teeth, leaving 16 teeth. On the other hand, the gear 3 is a spur gear having 32 teeth. The material of both gears 2 and 3 was made of steel. The impact mitigating mechanism includes a through-hole having a circular cross-section with an inner diameter of 7.6 mm formed by penetrating the gear 2 in the axial direction, and a cylindrical gap inserted into the through-hole and extending from the gear 3 in the axial direction. It consists of a pressing member 5 with a regulating member 5B and an impact buffering material 4. The shock absorbing material 4 was an O-ring having a nominal diameter of 3 mm, an outer diameter of 7.6 mm, an inner diameter of 3.8 mm, and a heat resistant temperature of 220 ° C.
The shock-absorbing material 4 of the O-ring was inserted in a compressed state between the pressing member 5 that covers the cylindrical gap regulating member 5B and the through-hole having a circular cross section. The pressing member 5 was a stainless steel M3 mm countersunk screw. The two-stage cylindrical gap regulating member 5A was made of brass with an outer diameter of the first stage of 4.0 mm and an outer diameter of the second stage of 6.0 mm. The gap G was regulated to 0.8 mm. The mass of the intermittent gear 1 with an impact relaxation function was 20 g.

  In short, in the case of the embodiment, when cushioning is started at the start of meshing between the gear teeth 6 and the rack first teeth 12A formed on the piston 11 in use, the shock absorbing material 4 has a gap G = 0.8 mm. An impact mitigation mechanism was configured to be compressed.

  In addition, the total mass from the rotor of the electric motor to the toy gear 1 with an impact relaxation function is 84 g, and the final reduction ratio to the toy gear 1 with an impact relaxation function is 18.7 / 1.

  The launch experiment was performed under conditions that simulated a survival game for competition with a launch energy of 1 J and 1500 shots / minute (= 25 shots / second). As a comparative example, an air gun incorporating a piston driving gear 108 integrated with a connecting pin 108C in which spur gears 108A and 108B are driven in the axial direction as shown in FIG. A launch experiment was conducted under launch conditions.

  As a result, in the case of a conventional air gun, if 3000 shots were made under conditions simulating a survival game for competition, the first teeth 105A of the rack formed on the piston 103 were damaged and the piston function could not be performed. On the other hand, in the case of the air gun of the embodiment, the rack No. 1 formed on the piston 11 even if it fires 30000 shots, which is 10 times the life limit firing number of the conventional air gun under the conditions simulating a survival game for competition. It was confirmed that the 1 tooth 12A was not damaged so as not to perform its function and could be used further.

It is a schematic plan view which shows the intermittent gear with an impact relaxation function concerning 1st Embodiment. It is XX sectional drawing of FIG. It is a figure explaining the effect | action of the intermittent gear with an impact relaxation function concerning 1st Embodiment. It is a schematic plan view which shows the intermittent gear with an impact relaxation function concerning 2nd Embodiment. It is YY sectional drawing of FIG. It is sectional drawing explaining the axial direction clearance adjusting mechanism of the gear for toys concerning this invention. It is sectional drawing explaining the axial direction clearance gap adjustment mechanism of the conventional toy gear. It is a figure explaining the drive mechanism of an air gun. It is another figure explaining the drive mechanism of an air gun. It is a figure explaining the problem of the conventional gear for driving a piston. It is a schematic sectional drawing which shows the structure of the conventional gear for driving a piston.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 10 Intermittent gear 2 with impact relaxation function 2, 3 gear 4 Shock absorbing material 5 Pressing member 5A Fastening bolt 5B Cylindrical clearance regulating member 6 Gear tooth 6A First tooth
7 toothless part 8 gear tooth 9 shaft core G gap 11 piston 12A first tooth 13 bearing 14 gap adjustment ring (shim)
DESCRIPTION OF SYMBOLS 15 Bush 16 Compression spring 17 Reduction gear 18 Small gear 19 Large gear 20 Air gun main body 21 Compression spring 101 Jet port 102 Cylinder 103 Piston 104 Compression spring 105 Rack tooth 105A 1st tooth 106 Gear tooth 106A 1st tooth 107 Toothless part 108 Piston Drive gear 108A, 108B Gear 108C Connecting pin
109 Reduction gear 110 Motor (drive source)
111 Spindle 112 O-ring 120 Air gun body 121 Bullet

Claims (6)

  A toy gear incorporated in a toy drive mechanism and used to intermittently transmit power from a drive source to the driven side, with one gear having a toothless part and the other gear coaxially overlapped And a toy gear which is connected by an impact relaxation mechanism interposed in the axial direction. A toy gear incorporated in a toy drive mechanism and used as a drive gear,
A toy gear characterized in that one gear and the other gear are coaxially overlapped and connected by an impact relaxation mechanism interposed in the axial direction.   3. A bearing provided in a toy main body with the shaft inserted in a floating state and a compression spring attached to the shaft when the toy gear according to claim 1 is incorporated in a toy drive mechanism as a drive gear. A toy gear axial clearance adjusting mechanism characterized by being incorporated in between.   When the toy gear according to claim 1 is incorporated as a piston driving gear, the shaft of the toy body is inserted in a floating state and incorporated between bearings provided on the toy main body.   A toy gear according to claim 2, wherein said toy gear is inserted between bearings provided in a toy body in the middle of a path from a power source to a piston driving gear, with said shaft inserted in a floating state. Drive mechanism. In assembling the toy gear according to claim 1 as a piston driving gear, the shaft is inserted in a floating state, and is incorporated between bearings provided on the toy body,
5. A toy gear according to claim 4, wherein the toy gear is inserted between bearings provided in a toy body in the middle of a path from the power source to the piston driving gear, with the shaft inserted in a floating state. Drive mechanism.

Images