JP6547103B2 - Folding white cane - Google Patents

Description

The present invention relates to a cane for the visually impaired, and more specifically, has a sufficient strength with excellent impact resistance against forces from the axial orthogonal direction of the shaft portion, a lightweight, durable and high comprising a rigid, yet relates cane which suppressed occurrence of rattling during use even when used for a long time.

  Conventionally, a cane is also referred to as a cane or a pole, and is used not only for visually impaired persons and persons with disabilities such as elderly people but also for healthy people in trekking and light mountain climbing. Such a cane generally comprises a rod-like shaft portion, a grip portion formed on the upper end of the shaft portion and gripped by the user, and a stone stick attached to the lower end of the shaft portion. Although these conventional canes have some differences in structure, most of them are made of materials such as wood and aluminum alloy.

  However, for example, in the case of a so-called white stick used by a visually impaired person, it is often used with the tip slightly lifted from the ground for a long time, in order to reduce the burden on the user. Weight reduction is desired. Then, the cane which comprised the shaft part with the carbon fiber reinforced resin material is proposed (for example, refer patent document 1). A wand with such a shaft portion is lighter than the conventional wand or aluminum alloy wand, and the problem of warping and corrosion is eliminated, but it is still long for visually impaired persons etc. It is not light enough to withstand the use of time, and since it is necessary to hit these frequently to find the conditions of the walking road surface and obstacles, the impact force at the time of hitting is transmitted to the shaft portion through the stone There is a problem that a micro crack (crack) is generated in the carbon fiber and the carbon fiber is easily broken at a part where the crack is generated.

  In order to solve the above problems, a cane has been proposed in which the shaft portion includes a high strength organic fiber reinforced resin layer and a carbon fiber reinforced resin layer, and a glass fiber reinforced resin layer on the inside (for example, patent documents 2). The shaft portion of the cane is hollow and comprises a plurality of shaft portions which can be connected and separated from each other, and the shaft portions adjacent to each other are connected to the connecting end of one shaft portion and the other shaft portion opposite thereto By providing a small diameter portion that can be inserted into and removed from the connection end (outer pipe), the cane is made foldable.

  However, when the shaft part and the small diameter part adhered to the shaft part satisfy each manufacturing standard, rattling may occur. In the case of white canes, in particular, work is frequently done to tap the road surface and obstacles, so the impact force at the time of the strike will break the bonded part between the shaft and the small diameter part, As a result, with the use, inner pipe diving occurs, causing rattling and unusable as walking assistance.

JP 2005-218473 A JP 2012-165767 A

  The present invention, in view of the above-mentioned present situation, is a cane having sufficient strength excellent in impact resistance to a force in a direction orthogonal to the axis of the shaft portion, being lightweight, durable and having high rigidity. Furthermore, it is an object of the present invention to provide a cane which has high adhesion strength between the shaft portion and the small diameter portion and can suppress generation of rattling during use even when used for a long time.

  In order to achieve the above object, the present invention provides a cane according to the following configuration.

It has a shaft portion (2), a grip portion (3) provided at the upper end of the shaft portion (2), and a stone stick (4) provided at the lower end, and the shaft portion (2) is a high strength organic fiber Two or seven stages of connectable and separable shaft portions (20 formed by the reinforced epoxy resin layer (201), the carbon fiber reinforced epoxy resin layer (202), and the glass fiber reinforced epoxy resin layer (203) to be the innermost layer (20 And the adjacent shaft portion (20) is provided with a small diameter portion (30) at the first connecting end (23) of one shaft portion (20), and the other shaft portion (20) opposite thereto. A foldable white cane (1) in which the front portion (302) of the small diameter portion (30) can be inserted and removed into the second connection end (24) of
The small diameter portion (30) is formed using a high strength organic fiber reinforced epoxy resin,
In the inner circumferential surface of the shaft portion (20) provided with the small diameter portion (30), a spiral recessed groove (25) having a cutting depth of 0.1 mm to 0.5 mm is formed;
A foldable white cane characterized in that a rear portion (301) of the small diameter portion (30) and an inner peripheral surface of a shaft portion (20) are bonded via an adhesive (32).

  According to the present invention, since the spiral groove is formed on the inner peripheral surface of the shaft portion, and the small diameter portion coated with the adhesive is inserted and bonded in the shaft portion, the spiral groove is formed. The adhesion strength can be higher than the adhesion method which does not form As a result, it is possible to prevent the inner peripheral surface of the shaft portion from being roughened by impact due to use, and it is possible to suppress damage to the bonded portion due to impact. Therefore, even if used for a long time, it can be used without worrying about breakage or rattling.

Also, by forming the small diameter portion with high strength organic fiber reinforced epoxy resin, even if the ground or an obstacle is hit with the tip of the cane, there is no risk of the small diameter portion being damaged by the impact, and the cane excellent in durability. Can be configured.

  By setting the number of shaft portions to 2 to 7, it becomes possible to fold and store small when not in use, and can be carried in a small storage space.

1 (a) is an external view of the cane, FIG. 1 (b) is an enlarged cross-sectional view of a portion B of FIG. 1 (a), and FIG. 1 (c) is FIG. The end view in the line AA of FIG. FIG. 5 is a cross-sectional view of the coupling end of the cane embodiment of the present invention prior to coupling. FIG. 7 is a cross-sectional view of the coupled end of the embodiment of the cane of the present invention in the coupled state; FIG. 4 (a) is a cross-sectional view of a shaft portion in which a spiral groove is formed, and FIG. 4 (b) shows a state in which a small diameter portion is started to be inserted into the shaft portion. FIG. 4C is a cross-sectional view showing a state in which the shaft portion and the small diameter portion are bonded.

  Hereinafter, the present invention will be specifically described based on the drawings.

FIG. 1A is an external view of a wand showing an embodiment of the present invention.
As shown in FIG. 1 (a), the cane (1) according to the embodiment of the present invention includes a shaft portion (2), a grip portion (3) provided on the upper end of the shaft portion (2), The shaft portion (2) is composed of a plurality of connectable and separable shaft portions (20) (a shaft portion (20)) Will be described later).

  The shaft portion (2) is shock resistant to the force in the direction perpendicular to the axial direction so as not to break easily even when impacted in the direction orthogonal to the axis, such as when the user of the wand (1) hits the bicycle The property of impact absorption energy of 10 J or more is preferable, and the property of 15 J or more is more preferable from the point of being excellent in safety and repairability. The impact resistance can be determined by using a drop weight type impact tester (product name: Drop weight type impact tester Dynatup (registered trademark) 9200 series) or the like described in JIS K 7055. It can measure according to a weight test method.

  Although the grip portion (3) is an example formed in an I-shape as one that can be used in the embodiment of the present invention, the walking road surface is modified by changing the thickness and angle of the I-shaped grip portion. It is possible to change suitably to what was formed in various shapes etc. which are easy to hit. In addition, if necessary, connecting materials, straps, etc. may be attached to any part, and the length and thickness of the grip portion (3) may be appropriately changed so that the user can firmly hold it. May be

  The resin material used for the grip portion (3) is not particularly limited as long as the effects of the present invention are not impaired. For example, polyester resin, polyamide resin, acrylic resin, ABS resin, polyolefin resin, polybutylene terephthalate resin, polyethylene terephthalate Resin, rubber, elastomer, fiber reinforced resin etc. are mentioned. In particular, when the grip portion (3) is formed of, for example, a carbon fiber reinforced resin or a high strength organic fiber reinforced resin, it is possible to have high strength while being lightweight, and it is preferable because it can be carried out inexpensively.

  At the lower end of the shaft portion (2), a stone stick (4) is attached. The mounting method of the stone stick (4) can be appropriately set in a range that does not interfere with the effects of the present invention, and for example, a mounting hole is recessed at the upper end thereof. A method is used in which the lower end of the is fitted in and fixed by caulking with an adhesive or double-sided tape or the like. This makes it possible to replace the stone stick (4) when worn or broken.

  The shape of the stone stick (4) is not limited to a specific shape as long as the effects of the present invention are not disturbed, but a cylindrical or frusto-conical shape is preferable in that there is no catching on road surface grooves and stairs. The shape is more preferred. Furthermore, it is particularly preferable to form the outer surface of the stone block (4) into a smooth curved surface. As a result, it is possible to make it more difficult for the vehicle to get caught on the road surface, the step portion such as the stairs, or the obstacle.

  In addition, the thickness and length of the stone stick (4) can be appropriately set within the range that does not hinder the effects of the present invention. For example, the outer diameter is larger than the outer diameter of the shaft portion (2) It can be set to a size that does not easily fit into a gap such as a grid of a groove cover arranged on a road surface.

FIG.1 (b) is an expanded sectional view of the B section of FIG. 1 (a).
As shown in FIG. 1 (b), the shaft portion (2) comprises a high strength organic fiber reinforced epoxy resin layer (201), a carbon fiber reinforced epoxy resin layer (202), and a glass fiber reinforced epoxy resin layer (203). , And is composed of 2 to 7 stages of shaft portions (20) which can be connected and separated. The high-strength organic fiber reinforced epoxy resin layer (201) and the carbon fiber reinforced epoxy resin layer (202) are provided at least one by one, and the glass fiber reinforced epoxy resin layer (203) is provided on the innermost side, Are stacked. Hereinafter, the high strength organic fiber reinforced epoxy resin layer is "high strength organic fiber reinforced resin layer", the carbon fiber reinforced epoxy resin layer is "carbon fiber reinforced resin layer", and the glass fiber reinforced epoxy resin layer is "glass fiber reinforced resin" It is called "layer".

The high strength organic fiber reinforced resin layer (201) can be manufactured by a known method. For example, the high-strength organic fibers, such as para-aramid fibers, after impregnated with epoxy resins and formed into a predetermined cylindrical shape, which was to cure the resin by heating at about room temperature to 130 DEG ° C., a predetermined length Manufactured by cutting. The carbon fiber reinforced resin layer (202) and the glass fiber reinforced resin layer (203) can be produced in the same manner.

  The organic fiber which comprises the said high strength organic fiber reinforced resin layer (201) should just be an organic fiber with high mechanical strength, such as tensile strength, and it is not limited to the thing of a specific material. For example, any of ultra high molecular weight polyethylene fibers, wholly aromatic polyamide fibers, wholly aromatic polyester fibers, heterocyclic high performance fibers, polyacetal fibers, etc. can be used singly or in combination of two or more. By using the organic fiber, it has light weight and high tensile strength, and has an elongation compared to inorganic fiber such as carbon fiber. Therefore, even if you hit the ground with a tip of a cane, for example, the organic fiber Since there is no possibility of generating a micro crack and it is excellent in durability, it is preferable. Thereby, even if the shaft portion (20) and the shaft portion (2) receive an impact (bending impact) from the direction orthogonal to the axis, the high strength organic fiber reinforced resin layer (201) is deformed in a buckling shape without breaking. , This shock can be mitigated.

  The carbon fiber reinforced resin layer (202) is provided between the high strength organic fiber reinforced resin layer (201) and the glass fiber reinforced resin layer (203), and temporarily the shaft portion (20) is from the direction orthogonal to the axis. Even if the carbon fiber is broken due to impact, the carbon fiber reinforced resin layer (202) is protected by the high strength organic fiber reinforced resin layer (201) integrated on the outer peripheral surface, and the shaft portion (20) is By only buckling deformation, severe breakage is prevented, and broken carbon fibers are prevented from protruding like a thorn, and for example, a visually impaired person etc. can grope at a damaged part by the impact. It is preferable because it can be confirmed safely. In addition, carbon fibers have high rigidity because they have a higher elastic modulus than organic fibers, and it is not necessary to form the high-strength organic fiber reinforced resin layer (201) excessively thick.

  The glass fiber reinforced resin layer (203) is provided at the innermost side among the fiber reinforced resin layers (201, 202, 203) constituting the shaft portion (20). This makes it possible to improve the wear resistance of the inner surface and prevent the organic fibers from being loosened on the inner surface of the cut end when the shaft portion is cut to a predetermined length or the like. It is preferable because it can be done. As glass fiber which comprises a glass fiber reinforced resin layer (203), an alkali-containing glass fiber, an alkali free glass fiber, a low dielectric glass fiber etc. can be used, for example.

The organic fibers or carbon fibers, the resin is impregnated into glass fibers, et epoxy resins.

  Although the above described the example which used the shaft part (20) of this invention, and one layer of each fiber reinforced resin layer (201 * 202 * 203), this invention is not limited to said case. For example, in the carbon fiber reinforced resin layer, the high strength organic fiber reinforced resin layer may be integrally laminated on at least the outer peripheral surface, but the high strength organic fiber reinforced resin layer is respectively formed on the outer peripheral surface and the inner peripheral surface. When integrally laminated, the carbon fiber reinforced resin layer is held between the inner and outer high strength organic fiber reinforced resin layers, and the shaft portion protected better by these high strength organic fiber reinforced resin layers Can also be formed.

  The content ratio of fiber to resin in each of the fiber reinforced resin layers (201, 202, 203) is not limited to a specific value as long as the effects of the present invention are not impaired, and varies depending on the type of organic fiber or resin and molding size However, the weight ratio is 80:20 from the viewpoint of being light weight, capable of securing a desired strength such as sufficient bending rigidity, and of a weight sufficient to withstand long-term use, and being resistant to breakage and excellent in safety and repairability. It is set in the range of 60 to 40:40, more preferably in the range of 75:25 to 65:35, and still more preferably in the range of 70:30 to 67:33. If the resin impregnation amount is too high, the appropriate strength can not be easily maintained, and if the resin impregnation amount is too low, the form does not form as a molded product, and even if it is formed, the appropriate strength can not be obtained. It is. Here, the above-mentioned "appropriate strength" means the strength for achieving the effects of the present invention.

  The weight and strength of the cane (1) are the thickness of the cane (1), the thickness of the shaft portion (2), the ratio of fiber to resin used in each fiber reinforced resin layer (201, 202, 203) and the thickness, It differs depending on the type of resin, etc. However, organic fibers have a lower specific gravity than carbon fibers, so by reducing the carbon fiber reinforced resin layer (202) and increasing the high strength organic fiber reinforced resin layer (201), a lightweight, high-strength cane ( 1) is obtained.

  In the shaft portion (20) and in the small diameter portion (30), a rubber cord (5) connecting the shaft portions (20) with each other is inserted. The rubber cord (5) may have elasticity or stretchability that can easily separate and connect the shaft portions (20), and the material and thickness thereof are not particularly limited, and known ones may be used. Can.

FIG. 1C is an end view taken along the line A-A of FIG.
As shown in FIG. 1 (c), the shaft portion (20) is hollow from the viewpoint of weight reduction of the cane, and is composed of a hollow portion (21) and an outer shell portion (22) around it. preferable. The cross-sectional area ratio between the hollow portion (21) and the outer shell portion (22) in the axis orthogonal cross section of the shaft portion is not limited to a specific value as long as the effects of the present invention are not impaired. The cross-sectional area ratio is preferably 85:15 to 56:44 because it has sufficient strength against force and is light enough to withstand long-term use, and it has better safety and repairability. It is more preferable that it is 80:20-60:40 from the point which also has. If the cross-sectional area ratio of the hollow portion (21) to the entire shaft portion is less than 56%, the cane can not be reduced in weight sufficiently, and the shaft portion (20) becomes too hard and fatigued if used for a long time. On the other hand, if the cross-sectional area ratio of the hollow portion (21) to the entire shaft portion (20) exceeds 85%, the cane becomes too lightweight and the strength against the force in the direction perpendicular to the axis becomes insufficient. Further, the cross-sectional shape of the shaft portion (20) is preferably a circular cross-sectional shape, and particularly preferably a true circular cross-sectional shape. Thereby, the shaft portion (20) can secure a desired strength against an impact from any direction.

  FIG. 2 shows a cross-sectional view of the connection end before connection in the plurality of connectable / separable shaft portions (20) of the present invention, and FIG. 3 shows a cross-sectional view of the connection end in the connection state. There is.

  As shown in FIGS. 2 and 3, the non-adhered portion (the adjacent other shaft) of the small diameter portion (30) adhered to the shaft portion (20) protrudes outward from the first connecting end (23) The front portion (hereinafter referred to as an inner pipe (302)) of the small diameter portion (30) inserted into the portion (20) is formed to have an outer diameter substantially equal to the inner diameter of the shaft portion (20) It is comprised so that insertion and removal are possible from the 2nd connection end part (24) side of other adjacent shaft part (20). That is, by inserting the inner pipe (302) into the second connection end (24), the shaft portions (20) are connected to each other, and the inner pipe (302) is pulled out. It can be a so-called foldable cane that is separated. The number of shaft portions (20), that is, the number of folding steps is not limited to a specific value, and is appropriately set to an arbitrary number of steps such as 2 to 7 from the length of the cane and the dimensions at the time of carrying. It is preferable that the shaft portion be a foldable cane composed of a plurality of shaft portions, since the cane can be folded and made compact when not in use and can be easily carried.

  The projection length of the inner pipe (302) needs to be such a length that the shaft portions (20) can be firmly connected to each other, and it is usually preferable to set to about 40 to 60 mm. Further, in FIGS. 2 and 3, since the resin coating layer (31) is formed on the surface of the inner pipe (302), the second connection end (24) and the inner pipe (302) Adhesion is improved, and rattling during use can be prevented. The resin coating layer (31) may be applied after bonding the shaft portion (20) and the rear portion of the small diameter portion (30) (hereinafter referred to as the adhesive portion (301)), drying completely, Preferably, a lubricating layer such as commercially available silicone grease may be provided on the outer peripheral surface of the resin coating layer (31).

  As a resin for forming the resin coating layer (31), an epoxy resin, a modified epoxy resin, a polyurethane resin or the like is preferably used from the viewpoint of being excellent in water resistance and heat resistance. The coating layer can be formed by applying the above-described resin or a coating agent in which the above-described resin is dissolved in a solvent by a method such as brush coating, spray coating, or dip coating, and drying. In particular, the polyurethane resin is excellent in the elasticity of a coating film, and is a one-component type in which a curing agent is blended with a polyurethane resin, or a two-component coating agent in which a polyurethane resin and a curing agent are mixed at the time of use. The coating layer can be formed in a short time only by applying by the method of (1) and drying for about a day, and furthermore, it can be carried out inexpensively.

  A shock absorbing material such as a rubber ring may be interposed between the connecting portions of the shaft portions (20) and between the first connecting end (23) and the second connecting end (24). This has the effect of enhancing the adhesion of the connecting part. This rubber ring can be replaced when worn or broken.

  In order to prevent stress concentration on a part of the cane (1), such as the first connection end (23) and the second connection end (24), it is possible to use a connection portion where stress is easily concentrated, particularly with a stone A joint cover can also be used at the closest connection part. As a result, the mechanical strength can be enhanced by firmly reinforcing the impact from the outside from the outside, and it is possible to reduce the risk of breakage of the cane (1) due to stress concentration and the fall of the user accompanying this. You can use a cane safely.

  FIG. 4 is an explanatory view showing up to the step of inserting the small diameter portion (30) into the shaft portion (20) having the spiral recessed groove (25) formed on the inner surface and bonding. As shown in FIG. 4 (a), on the first connecting end (23) side inner circumferential surface of the shaft portion (20) of the cane of the present invention, the adhesion to the small diameter portion (30) is improved. A spiral groove (25) is formed. When the adhesive portion (301) of the small diameter portion (30) coated with the adhesive (32) on the outer peripheral surface is inserted into the shaft portion (20) by providing the spiral recessed groove (25), The adhesive (32) enters the recessed groove (25) to improve the adhesion between the inner circumferential surface of the shaft portion (20) and the outer circumferential surface of the adhesive portion (301), thereby suppressing the generation of rattling of the cane. be able to. Further, by forming the concave groove (25) in a spiral shape, the adhesive (32) can easily enter toward the central position in the axial direction of the shaft portion (20).

  The method of forming the spiral recessed groove (25) is not limited to a specific method as long as the effects of the present invention are not impaired. For example, it can be formed using a threading tap or the like.

The cutting depth of the spiral groove (25) is not particularly limited as long as the effect of the present invention is not impaired, but the depth is substantially the same as the glass fiber reinforced resin layer forming the shaft portion (20). It is preferably 0.1 mm to 0.5 mm. If it is smaller than 0.1 mm, sufficient adhesive strength is not exhibited even if the adhesive gets into the ditch, and if it exceeds 0.5 mm, the strength of the shaft portion (20) itself may be reduced. is there.

  The formation length of the concave groove (25) is not limited as long as the effects of the present invention are not impaired, but the length of the small diameter portion (30) fixed in the shaft portion (20), ie, the bonding portion (301) It is preferable to form slightly longer than the length of. Usually, about 40 mm to 70 mm, more preferably about 45 mm to 65 mm, and particularly preferably about 50 mm to 60 mm from the first connection end (23) side. If it is less than 40 mm, the surface area of the formed spiral concave groove (25) decreases, so that it is difficult to obtain sufficient adhesive strength even if the adhesive (32) enters. On the other hand, significantly exceeding the length of the small diameter portion (30) inserted into the shaft portion (20) not only results in unnecessary cutting but also reduces the working efficiency.

  FIG. 4 (b) shows that the adhesive portion (301) coated with the adhesive (32) of the small diameter portion (30) starts to be inserted into the shaft portion (20) in which the spiral groove (25) is formed. A cross-sectional view of the state is shown, in which the inner pipe (302) is not coated with a resin coating layer. The resin coating layer described above is applied to the portion (inner pipe (302)) on which the adhesive (32) of the small diameter portion (30) is not applied, and the second of the adjacent other shaft portions (20) is applied. It is inserted into the coupling end (24).

  FIG. 4 (c) shows the adhesive (30) after the adhesive portion (301) of the small diameter portion (30) coated with the adhesive (32) is completely inserted into the shaft portion (20), 32) Wipe off and dry to show that the shaft portion (20) and the small diameter portion (30) are adhered.

  The small diameter portion (30) may be loaded around the first connection end (23) by use and may cause breakage such as cracks, so the small diameter portion may be produced separately from the shaft portion (20). It is preferable to apply and bond the adhesive (32) up to about half the length of (30).

  The adhesive (32) is not particularly limited as long as the effects of the present invention are not impaired. For example, a commercially available epoxy adhesive, epoxy chemical reaction adhesive, styrene butadiene rubber adhesive, silylated urethane resin A system adhesive etc. can be used.

  Hereinafter, the present invention will be more specifically described using examples and comparative examples, but the present invention is not limited to the following examples.

Example 1
The adhesive strength between the shaft portion and the small diameter portion was tested by the following method.
From the side of the first connection end of the shaft portion with an inner diameter of 10 mm × length 200 mm, cut the concave groove to a depth (length) of 55 mm using a 10 mm threading tap, blow away chips and the like with air, It was a shaft part for bonding.
A small diameter portion for adhesion that has an epoxy resin adhesive applied from one end of a small diameter portion with an outer diameter of about 9.6 mm to 9.9 mm and a length of 100 mm to a half length (50 mm) portion of the total length And
The small diameter portion was inserted into the shaft portion, and the adhesive exuded to the insertion port was wiped off when inserted, and the maximum load was measured and tested using those dried for 48 hours or longer. The maximum load measured at this time was taken as the adhesive strength.

(Example 2)
It tested by the structure similar to Example 1 except having used an epoxy type chemical reaction type adhesive agent.

(Example 3)
It tested by the structure similar to Example 1 except having used the styrene butadiene rubber-type adhesive agent.

(Example 4)
It tested by the structure similar to Example 1 except having used the silylated urethane resin adhesive.

(Comparative example)
It tested by the structure similar to an Example except having used what did not form the ditch | groove in the internal peripheral surface of the said shaft part.

[Adhesive force measurement test]
The shaft portion and the small diameter portion bonded and fixed by the above method were tested at a pressing speed of 100 mm / min in a state in which a compression test jig was attached to a tensile tester (manufactured by Instron, model: 5966) and stood upright. . The maximum load (N) at this time was taken as the adhesive strength. Moreover, the said test was carried out multiple times and the average of the largest load (N) was computed. The test results are shown in Table 1.

  As apparent from the results of Table 1, it was found that the adhesive strength of the example in which the recessed groove was formed was higher than that of the comparative example in which the recessed groove was not formed.

The cane described in the above embodiment is illustrated to embody the technical idea of the present invention, and the shape, size, number of layers, etc. of each part are not limited to those of this embodiment, in which that many changes and modifications may be made within the scope of the claims.

  The cane of the present invention is useful as a white cane for the visually impaired, and also as a cane for climbing or sports such as skiing or for walking normally. In addition, the cane of the present invention can reduce the physical burden of the user, and is particularly effective for elderly people, young people and visually impaired people, and promotes independence support, and social participation and labor of the care recipient. It is also useful for improving productivity.

Reference Signs List 1 cane 2 shaft portion 3 grip portion 4 stone stick 5 rubber string 20 shaft portion 21 hollow portion 22 outer shell portion 23 first connection end portion 24 second connection end portion 25 recessed groove 30 small diameter portion 31 resin coating layer 32 adhesive 201 High strength organic fiber reinforced resin layer 202 Carbon fiber reinforced resin layer 203 Glass fiber reinforced resin layer 301 Rear (adhesion part)
302 Front (inner pipe)

Claims (1)

It has a shaft portion (2), a grip portion (3) provided at the upper end of the shaft portion (2), and a stone stick (4) provided at the lower end, and the shaft portion (2) is a high strength organic fiber Two or seven stages of connectable and separable shaft portions (20 formed by the reinforced epoxy resin layer (201), the carbon fiber reinforced epoxy resin layer (202), and the glass fiber reinforced epoxy resin layer (203) to be the innermost layer (20 And the adjacent shaft portion (20) is provided with a small diameter portion (30) at the first connecting end (23) of one shaft portion (20), and the other shaft portion (20) opposite thereto. A foldable white cane (1) in which the front portion (302) of the small diameter portion (30) can be inserted and removed into the second connection end (24) of
The small diameter portion (30) is formed using a high strength organic fiber reinforced epoxy resin,
In the inner circumferential surface of the shaft portion (20) provided with the small diameter portion (30), a spiral recessed groove (25) having a cutting depth of 0.1 mm to 0.5 mm is formed;
A foldable white cane characterized in that a rear portion (301) of the small diameter portion (30) and an inner peripheral surface of a shaft portion (20) are bonded via an adhesive (32).

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