阅读说明：本技术 尺子 (Ruler ) 是由 岩津博文 于 2019-04-09 设计创作，主要内容包括：本发明提供一种能够以简单结构将金属部件与树脂部件牢固地卡合的尺子。尺子具有金属部件和树脂部件,在所述金属部件的一端形成有凸出部,在所述树脂部件的一端形成有与所述金属部件的突出部卡合的凹部。所述凸出部形成为前端比基端侧粗的形状,并沿长度方向连续延伸。所述金属部件以及所述树脂部件通过嵌件成型一体地形成。(The invention provides a ruler capable of firmly clamping a metal part and a resin part with a simple structure. The ruler comprises a metal member and a resin member, wherein a protruding portion is formed at one end of the metal member, and a recessed portion that engages with the protruding portion of the metal member is formed at one end of the resin member. The protruding portion is formed in a shape that the tip is thicker than the base end side and extends continuously in the longitudinal direction. The metal member and the resin member are integrally formed by insert molding.)

1. A ruler, characterized by comprising:

a metal member having a scale on a first end side in a width direction orthogonal to a longitudinal direction thereof and an engaging portion on a second end side in the width direction thereof, an

And a resin member having a scale on a second end side in a width direction orthogonal to the longitudinal direction thereof, and an engaged portion engaged with the engaging portion of the metal member on a first end side in the width direction, and through which an object to be measured can be observed.

2. The ruler of claim 1,

the engaging portion of the metal member is a protruding portion formed to protrude from an end surface of the second end of the metal member toward the resin member side,

the engaging portion of the resin member is a recess formed in an end surface of the first end of the resin member, and the protruding portion is engaged with the recess.

3. The ruler of claim 2,

the projecting portion of the metal member is formed to be thicker at the tip than at the base end side.

4. The ruler of claim 2 or claim 3,

the protruding portion is formed to extend continuously in a longitudinal direction of the metal member.

5. The ruler of claim 4,

the metal component is made of aluminum and is formed by extrusion molding.

6. The ruler of claim 1,

at least one of the metal member and the resin member has a protrusion formed to protrude from a bottom surface.

7. The ruler of claim 6,

the protrusion is formed on the bottom surface of the metal member,

the front end surface of the protrusion is located on the same plane as the bottom surface of the resin member.

8. The ruler of claim 1,

the resin member is formed of polycarbonate.

9. The ruler of claim 1,

the metal member and the resin member are integrally formed by insert molding.

Technical Field

The present invention relates to a ruler, and more particularly to a ruler formed of a metal material and a resin material.

Background

In the use of paper cutters, metal rulers are often used to assist in cutting. However, since the metal ruler is opaque, a ruler made of transparent resin is suitable for performing a fine measurement work. Patent document 1 proposes a ruler made of a metal material and a resin material. The ruler of patent document 1 is formed of a plate-shaped synthetic resin and a graduated plate-shaped metal formed integrally with the synthetic resin. However, according to the ruler disclosed in patent document 1, since no scale is provided on the resin member, accurate measurement cannot be performed. Further, in patent document 1, the structure of the joint portion between the resin member and the metal member and the specific joining method are not specifically described, and therefore, according to patent document 1, the resin member and the metal member cannot be joined satisfactorily.

Disclosure of Invention

The invention provides a ruler capable of firmly clamping a metal part and a resin part with a simple structure.

A ruler according to a first aspect includes a metal member having a scale on a first end side in a width direction orthogonal to a longitudinal direction thereof and an engaging portion on a second end side in the width direction, and a resin member having a scale on a second end side in the width direction orthogonal to the longitudinal direction thereof and an engaged portion engaged with the engaging portion of the metal member on the first end side in the width direction, and an object to be measured can be observed through the resin member. According to the above technical means, a ruler in which a metal member and a resin member are engaged with each other can be obtained with a simple configuration. Here, the term "engagement" in the present invention includes a case where the components are combined by insert molding, as will be described later.

A ruler according to a second aspect is the ruler according to the first aspect, wherein the engaging portion of the metal member is a protruding portion that protrudes from an end surface of the second end of the metal member toward the resin member, and the engaging portion of the resin member is a recessed portion that is formed on an end surface of the first end of the resin member and into which the protruding portion engages. Since the protrusion is formed on the metal member side, the protrusion has high strength and is not easily broken, that is, has high engagement strength due to the properties of the metal material itself. If the projection is provided on the resin member, the resin member is easily broken due to the properties of the resin material itself. Further, since the projection can be seen through the resin member, the metallic texture of the metal member can be sufficiently exhibited. In the case of manufacturing by insert molding, if a protrusion is formed on the resin member side, it is difficult to confirm whether or not the protrusion sufficiently enters the recess of the metal member. However, if the metal member is formed with the projection as in the present embodiment, it is possible to very easily check whether or not the resin sufficiently surrounds the projection.

A ruler according to a third aspect is the ruler according to the second aspect, wherein the protruding portion of the metal member is formed to have a tip thicker than a base end side. Since the metal tip is thick, the metal tip can be more firmly fitted into the recess formed in the resin member, and the engagement strength can be increased. Further, since the contact surface between the metal member and the resin member is increased, the engagement strength is increased.

A ruler according to a fourth aspect is the ruler according to the second or third aspect, wherein the protruding portion is formed to extend continuously in a longitudinal direction of the metal member. Since the projecting portion is continuously formed in the longitudinal direction of the metal member, the size of the engaging portion is increased, and the engaging strength is increased. In addition, such a shape can be formed by extrusion molding from the viewpoint of processing, thereby improving production efficiency.

A ruler according to a fifth aspect is the ruler according to the fourth aspect, wherein the metal member is made of aluminum and is formed by extrusion molding. Since aluminum has good ductility, metal parts can be easily manufactured in large quantities by extrusion molding.

A ruler according to a sixth aspect of the present invention is the ruler according to the first aspect, wherein at least one of the metal member and the resin member has a protrusion formed to protrude from a bottom surface. Generally, the bottom surface of the ruler is hard to be lifted when it is in close contact with the object to be measured, but the bottom surface is separated from the object to be measured by the projection, and therefore the ruler can be easily lifted. And because of having the arch, so have the gap between paper and the metal part, so in the case of using the ruler to guide the drawing pen, duckbilled, the ink is difficult to ooze between paper and the ruler.

A ruler according to a seventh aspect of the present invention is the ruler according to the sixth aspect, wherein the projection is formed on a bottom surface of the metal member, and a front end surface of the projection is flush with a bottom surface of the transparent resin member. Since it is generally desirable that the front end portion of the ruler be narrow, narrowing generally results in reduced strength. However, since the metal member is made of aluminum, the metal member has high strength even if the tip portion on the first end side becomes narrow.

A ruler according to an eighth aspect of the present invention is the ruler according to the first aspect, wherein the resin member is formed of polycarbonate. Since the polycarbonate material has high transparency, a ruler having excellent transparency can be manufactured using the polycarbonate material. The ruler with excellent transparency can accurately perform relevant work such as measurement. In addition to being highly transparent, polycarbonates have good mechanical properties at ordinary use temperatures, in particular with the advantage of being impact-resistant, and are therefore not easily damaged during use.

A ruler according to a ninth aspect of the present invention is the ruler according to the first aspect, wherein the metal member and the resin member are integrally formed by insert molding. The ruler can be easily manufactured by insert molding, and since the resin material is heated and melted and then integrated with the metal member, the connection strength between the metal member and the resin member is high.

According to the present invention, it is possible to provide a ruler capable of firmly engaging a metal member with a resin member with a simple structure.

Drawings

Fig. 1 is a perspective view of a ruler R according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the ruler R shown in fig. 1.

Fig. 3 is a cross-sectional view of the metal part 1 in fig. 1 and 2.

Fig. 4 is a sectional view of the resin member 2 in fig. 1 and 2.

Fig. 5 is a sectional view of a metal part of the ruler R of other embodiments.

Description of the symbols of the drawings:

an R … ruler; 1 … metal parts; 2 … resin member; 11 … metal part body; 12 … projection; 13 … protrusions; 14 … scale; 21 … resin member main body; 22 … recess; 24 … scale.

Detailed Description

An embodiment of the present invention will be described below with reference to the drawings. As shown in fig. 1, a ruler R according to an embodiment of the present invention includes a metal member 1 and a resin member 2.

First, the metal member 1 will be explained with reference to fig. 2. As shown in fig. 2, the metal member 1 has an elongated shape extending in the longitudinal direction. The direction perpendicular to the longitudinal direction is defined as the width direction. The metal member 1 has a metal member body 11, and a scale 14 and a projection 12 are formed on both ends of the metal member body 11 in the width direction, respectively, and one end on which the scale 14 is formed is referred to as a first end and one end on which the projection 12 is formed is referred to as a second end. In the present embodiment, the metal member 1 is formed of aluminum, and the metal member 1 is manufactured by extrusion molding. Since aluminum has good ductility, it is easy to manufacture various relatively complicated shapes by extrusion molding and can be mass-produced at a relatively low cost.

As shown in fig. 3, the metal member body portion 11 of the metal member 1 has a substantially rectangular cross section, is chamfered at a first end side to form a large inclined surface, and is formed with a scale 14 on the first end side of the inclined surface. A projection 12 is formed at an end surface of the second end of the metal member main body portion 11, and the projection 12 is located in the middle of the end surface. The shape of the projecting portion 12 is a straight line, and is generally T-shaped, having a thin base end and a thick tip end, the tip end having a size approximately twice that of the base end. Specifically, the base end extends in the horizontal direction from the second end side of the metal member 11, has an upper face and a lower face, and the upper face is parallel to the lower face. The front end is integrally formed in a rectangular shape with a second end side of the base end so as to be orthogonal to the base end. In addition, the junction of the perpendicular intersections of the projections 12 is chamfered. Since the projecting portion 12 has such a simple structure as described above that there is no space into which resin is difficult to flow such as a slit, and the joint where the perpendicular intersections are chamfered, resin can sufficiently flow into the thinner base end of the projecting portion 12 in the insert molding process described later, so that the engagement strength can sufficiently be ensured. The projection 12 extends in the lengthwise direction of the ruler R and has the same length as the ruler R. Since the projecting portion 12 is continuously formed in the longitudinal direction of the metal member 1, the size of the engaging portion increases, and the engaging strength increases. In addition, such a shape can be formed by extrusion molding from the viewpoint of processing, thereby improving production efficiency. In the present embodiment, the distal end is formed in a plate shape orthogonal to the base end, and the base end and the distal end are T-shaped as a whole. The proximal end and the distal end may have other shapes such as a cross shape and a mushroom shape.

The metal member body 11 has 5 protrusions 13 formed on the bottom surface thereof. The 5 protrusions 13 each have a semicircular shape, and they are uniformly formed at the bottom surface of the metal member 11 at the same intervals. The projection 13 also extends in the lengthwise direction of the ruler R, and has the same length as the ruler R, as the projection 12. The shape of the projection 13 is not limited to a semicircular shape, and may be an elliptical shape or the like as will be apparent to those skilled in the art. The number and pitch of the projections 13 may be changed according to the size and specific use of the ruler R.

Next, the resin member 2 will be described, and as shown in fig. 2, the resin member 2 has an elongated shape extending in the longitudinal direction, similarly to the metal member 1. The direction perpendicular to the longitudinal direction is defined as the width direction. The resin member 2 has a resin member body 21, and scales 24 and recesses 22 are formed at both ends of the body in the width direction. The end where the scale 24 is formed is referred to as a second end, and the end where the recess 22 is formed is referred to as a first end. In the present embodiment, the resin member 2 is made of polycarbonate. Since polycarbonate has excellent transparency, the object to be measured under the ruler can be clearly observed through the resin member 2 during use, and measurement and related operations can be accurately performed. In addition to being highly transparent, polycarbonates have good mechanical properties at ordinary use temperatures, in particular with the advantage of being impact-resistant, and are therefore not easily damaged during use.

As shown in fig. 4, the resin member main body 21 of the resin member 2 is substantially rectangular in cross section, chamfered at the second end side to form a large inclined surface, and formed with a scale 24 at the second stage side of the inclined surface. The recess 22 is formed in an end surface of the first end of the body portion 24, and the recess 22 is located in the middle of the end surface. The recess 22 has a shape corresponding to the projection 12, i.e. the recess 22 is thinner on the outside and thicker on the inside, the dimension of the inside being approximately twice the dimension of the outside. The concave portion 22 extends in the longitudinal direction of the ruler R and has the same length as the ruler R. As shown in fig. 3 and 4, the bottom surface of the resin member 2 and the front end surface of the protrusion 13 of the metal member 1 are flush with each other, and the level difference formed by the protrusion 13 can be eliminated by chamfering the resin member 2 to form a slope. This can prevent the resin member 2 from being formed into a right-angled portion at that position and easily getting stuck during use, etc. The top surface of the resin member 2 and the top surface of the metal member 1 are located on the same plane.

In the present embodiment, the ruler R is formed by integrating the metal member 1 and the resin member 2 by insert molding. First, a metal member 1 is manufactured by extrusion molding, and then the manufactured metal member 1 is put into a mold prepared in advance, and a molten resin is injected into the mold, thereby forming a ruler R formed by the metal member 1 and the resin member 2 together.

The metal member 1 and the resin member 2 can be firmly locked together by this manufacturing method of insert molding. Since the metal member 1 is formed with the convex portion 12 and the resin member 2 is formed with the concave portion 22, the convex portion 12 has high strength, that is, the metal member 1 and the resin member 2 have high engagement strength, as is clear from the property of aluminum. Further, according to the structure of the convex portion 12 and the concave portion 22, the protruding convex portion 12 is surrounded by the resin material, so that the metallic luster and the texture of the metal processing exhibited by the aluminum convex portion 12 can be seen through the resin member 2, and the aesthetic feeling of the ruler of the present embodiment is improved. In addition, since the entire resin component 2 can be observed, the quality of the resin component 2 produced by insert molding can be easily confirmed, which contributes to quality control of products. On the other hand, when the convex portion is formed in the resin member 2 and the concave portion is formed in the metal member 1, the strength of polycarbonate is significantly lower than that of aluminum, so that the convex portion is easily broken and the engagement strength between the metal member 1 and the resin member 2 is low. In addition, since aluminum is opaque, it is difficult to confirm the quality of the projection formed by the resin member 2 in the recess of the metal member 1 during the insert molding process, which is disadvantageous to the quality management of the product.

In use, since the plurality of semicircular projections 13 are formed on the bottom surface of the metal member 1, and a gap is formed between the metal member 1 and the object to be measured or the place where the ruler R is placed, the user can easily pick up the ruler, and the ruler is not attached to the surface of the object to be measured or the place where the ruler R is placed, and is difficult to pick up. In the present embodiment, since the distal end surface of the projection 13 is flush with the bottom surface of the resin member, the resin member can be brought into close contact with the surface of the object to be measured during measurement, information such as characters under the resin member 2 and an end portion of the object to be measured can be clearly confirmed through the resin member 2, and measurement accuracy can be improved. Since the plurality of projections are formed on the bottom surface of the metal member 1 and the slope is formed on the first end side of the metal member 1, the tip end surface on the first end side of the metal member 1 becomes narrow. However, since the metal member 1 is made of aluminum, the metal member 1 has high strength even if the distal end surface on the first end side is narrowed. On the other hand, if a plurality of projections are formed on the bottom surface of the resin member 2, the thickness of the resin member 2 decreases, the end surface of the second end thereof becomes narrow, and the strength in the vicinity of the end surface decreases. During use, breakage is likely to occur.

While one embodiment has been described above, the present invention is not limited to the above embodiment, and various changes and modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the example in which the engaging portion of the metal member has a T-shape was described, but the projecting portion 12 of the present invention is not limited to the above shape. As shown in fig. 5, the projecting portion 12a may be formed in a generally circular shape with a projection shape as a whole, and a recess portion having a corresponding shape may be formed in the resin member. Since the tip of the projecting portion 12a is thicker than the base end side, the metal member and the resin member can be reliably engaged with each other by the engaging portion constituted by the projecting portion 12a and the recess corresponding to the projecting portion 12 a. Further, since the small projection is formed, the engagement strength can be further improved. The shape of the engaging portion may be any of those described above, and may be any of those that can ensure the engaging strength between the metal member 1 and the resin member 2. Further, the more complicated the shape is, the higher the engaging strength of the two members at the time of insert molding is. However, the more complicated the shape, the more difficult the molding becomes and the processing becomes difficult. And as a ruler, does not require particularly high strength. Therefore, the shapes shown in fig. 1 to 4 are preferable in view of the engagement strength and the ease of molding.

In the above embodiment, the metal member 1 is provided with the semicircular projection 13 formed to project from the bottom surface, but other embodiments may be adopted. For example, the semicircular projection 13 may be formed on the resin member 2, and similarly, it is possible to prevent the ruler from being attached to the surface of the object to be measured or the place where the ruler is placed and difficult to pick up. The number and arrangement of the projections 13 can be appropriately selected as needed. In addition, the shape of the projecting portion is not limited to the semicircular shape, and other shapes capable of stably supporting the ruler may be adopted.

In the above embodiment, the case where the metal member 1 is formed of aluminum was described, but other metal materials having the same performance may be used. In the above embodiment, the case where the resin member 2 is made of transparent polycarbonate has been described, but other resin materials having a strength enough to allow a user to clearly recognize the object to be measured under the ruler may be used.