JPH11183170A - Magnet-mounting structure in level - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide magnet-mounting structure in a level that has a simple configuration and superior practical use and can easily mount a magnet. SOLUTION: In the structure, a magnet exposure hole 4 is provided on a measurement bottom surface 3 of a body case 1, and a magnet body 5 is mounted and fixed into the body case 1, so that a lower end part 5A of the magnet body 5 is exposed from the magnet exposure hole 4 while being nearly flush with the measurement bottom surface 3. In this case, a lower edge part 5A of the magnet body 5 is allowed to project slightly and a magnet-mounting member 6 where the magnet body 5 is provided can be inserted from an edge opening 1A of the body case 1 into the body case 1. At the same time, when the magnet-mounting member 6 is inserted into the body case 1, the lower-edge part 5A of the magnet body 5 projecting from the bottom part of the magnet- mounting member 6 is pressed and retained in suppressed state between an inner upper surface 10 and an inner bottom surface 9 of the body case 1 while it is in contact with the inner bottom surface of the body case 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet for attaching and fixing a level to a measuring surface so as to be substantially flush with a magnet exposing hole provided on the measuring bottom. The present invention relates to a magnet mounting structure in a level.

[0002]

2. Description of the Related Art
Although various structures have been proposed as a magnet mounting structure in a spirit level, the present invention pushes and inserts a magnet mounting member having a magnet mounted from an end opening of a body case to be closed with a cap, and thereby inserts the magnet. An object of the present invention is to provide a magnet mounting structure for an epoch-making level that can be mounted and fixed in a housing so that a lower end of the magnet is exposed substantially flush from a magnet exposure hole provided in a bottom surface of the housing. And

[0003]

The gist of the present invention will be described with reference to the accompanying drawings.

A magnet exposure hole 4 is provided on a measurement bottom surface 3 of a body case 1 provided with a measurement unit 2 for measuring horizontality and verticality such as a measurement bubble tube 2A. In a magnet mounting structure in a level which mounts and fixes the magnet body 5 in the body case 1 so that the lower end portion 5A of the magnet 5 is exposed substantially flush with the measurement bottom surface 3,
The lower end portion 5A of the housing is slightly projected downward, and a magnet mounting member 6 provided with the magnet body 5 is configured to be insertable into the housing body case 1 through the end opening 1A of the housing body case 1. When the magnet mounting member 6 is inserted into the case 1, the lower end 5 of the magnet 5 protrudes from the bottom of the magnet mounting member 6.
A is configured so as to be pressed and held between the inner upper surface 10 and the inner bottom surface 9 of the body case 1 in a state where A is in contact with the inner bottom surface 9 of the body case 1. The lower end portion 5A of the magnet body 5 is inserted into the magnet exposure hole 4 by inserting and moving the magnet mounting member 6 while being pressed against the elastic member.
Are engaged so that the magnet mounting member 6 is locked and fixed in the body case 1 according to the magnet mounting structure in the level.

The magnet mounting member 6 is provided with a mounting portion 6A for mounting the magnet body 5 at a lower portion, and an elastic portion 6B capable of bending and deforming being pressed against an inner upper surface 10 of the case 1 at an upper portion. 2. The magnet mounting structure according to claim 1, wherein the magnet mounting member 6 is formed of resin.

A mounting portion 6 for mounting the magnet body 5
The magnet mounting member 6 is formed by providing an arch-shaped elastic portion 6B on the upper part of A. When the magnet mounting member 6 is inserted through the end opening 1A of the case 1, the upper part of the elastic portion 6B is formed. 3. The magnet mounting structure according to claim 2, wherein the elastic portion 6B is configured to bend and abut against the inner upper surface 10 of the housing 1 by elastic pressure.

The magnet body 5 has a structure in which a metal plate 5C is attracted to a permanent magnet 5B. The magnet body 5 is mounted and fixed to a mounting portion 6A of the magnet mounting member 6, and the metal plate of the magnet body 5 is fixed. The lower end of 5C is provided as a lower end 5A of the magnet body 5 so as to protrude slightly downward from the mounting portion 6, and the lower end 5A is configured to engage with the magnet exposure hole 4. The present invention relates to a magnet mounting structure in a level according to any one of claims 1 to 3.

The magnet body 5 adsorbs a metal plate 5C on both sides of the permanent magnet 5B, and the lower end of each of the metal plates 5C is used as the lower end 5A of the magnet body 5 to measure the body case 1. 5. The magnet mounting structure in a level according to claim 4, wherein said magnet mounting structure is configured to engage with two magnet exposure holes 4 arranged side by side on said bottom surface 3.

Further, the width of the magnet mounting member 6 substantially matches the width of the case 1, and the magnet mounting member 6 is moved along the inner surface of the case 1 in a resilient state to thereby mount the magnet. The lower end portion 5A of the magnet body 5 projecting from below the member 6 is engaged with the magnet exposure hole 4 by the elastic force,
The magnet mounting member (6) is configured to be locked and fixed to the body case (1).
It relates to the magnet mounting structure in the level described in the paragraph.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention (how to implement the invention), which is considered to be the best, will be briefly described with reference to the drawings, showing its operational effects.

The magnet body 5 is mounted on the magnet mounting member 6 with the lower end portion 5A of the magnet body 5 projecting slightly downward, and the magnet mounting member 6 is located deeper than the end opening 1A for closing the cap of the body case 1. Insert toward.

At this time, the magnet mounting member 6 is in contact with the inner upper surface 10 of the body case 1 while the lower end 5A of the magnet body 5 slightly projecting from the bottom is in contact with the inner bottom surface 9 of the body case 1. It is in a state of being held in pressure contact with the bottom surface 9 in an elastic pressure state.

[0013] While being pressed against the body case 1 in an elastic pressure state, when the body case 1 is pushed inward against the slip resistance due to the elastic pressure state, it moves into the magnet exposure hole 4 provided on the bottom surface of the body case 1. The lower end portion 5A of the magnet body 5 is automatically lowered and engaged by the elastic pressure, and the magnet mounting member 6 is locked and fixed in the case body 1.

Therefore, according to the present invention, the magnet body 5 can be automatically mounted and fixed at a predetermined position simply by pushing and inserting the magnet mounting member 6 having the magnet body 5 mounted in the body case 1.

In addition, since this insertion movement is configured to be pushed into the body case 1 while being pressed against and held in an elastic pressure state, the elastic pressure contact acts as a push-in resistance, but this insertion movement is stably and reliably performed. Well done,
When automatically inserted to a predetermined position by this elastic force, the lower end portion 5A of the magnet body 5 engages with the magnet exposure hole 4 and can be pressed and locked and fixed.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

An elongated magnet exposure hole 4 is formed in a measurement bottom surface 3 of a long rectangular tube-shaped metal body case 1 provided with a measurement unit 2 for measuring horizontality and verticality such as a measurement bubble tube 2A. Are formed side by side in two places, and the magnet body 5 is
The magnet body 5 is mounted and fixed in the body case 1 so that the lower end 5A of the magnet body 5 is exposed substantially flush with the measurement bottom surface 3.

In this embodiment, the lower end 5A of the magnet body 5 is provided.
The magnet mounting member 6 provided with the magnet body 5 with a slightly protruding state is provided so as to be insertable into the body case 1 from the end opening 1A closed by the closing member 8 of the body case 1, When the magnet attachment member 6 is inserted into the case 1, the lower end 5A of the magnet body 5 projecting from the bottom of the magnet attachment member 6 comes into contact with the inner bottom surface 9 of the case 1. The magnet mounting member 6 is configured so as to be pressed and held between the inner upper surface 10 and the inner bottom surface 9 of the body case 1 in an elastic pressure state.
The lower end portion 5A of the magnet body 5 is engaged with the magnet exposure hole 4 by inserting and moving the magnet mounting member 6.
Are configured to be locked and fixed in the case 1.

More specifically, the magnet mounting member 6 is provided with a mounting portion 6A for mounting the magnet body 5 at a lower portion, and a flexibly deformable elastic portion which is pressed against an inner upper surface 10 of the case 1 at an upper portion. The magnet mounting member 6 is formed of resin.

That is, in the present embodiment, the magnet mounting member 6 is formed by providing an arch-shaped elastic portion 6B on the upper portion of the case-shaped mounting portion 6A for mounting the magnet body 5. When inserted from the end opening 1A of the case 1, the upper portion of the elastic portion 6B is configured to bend the elastic portion 6B against the inner upper surface 10 of the case 1 so as to abut against the elastic force.

The magnet body 5 has a structure in which metal plates 5C are attracted to both sides of a permanent magnet 5B. The magnet body 5 is mounted and fixed to a mounting portion 6A of the magnet mounting member 6, and The lower end of the metal plate 5C is connected to the lower end 5A of the magnet body 5.
As provided in the state slightly protruding downward from the mounting portion 6,
The lower end portion 5A is configured to engage with two magnet exposure holes 4 juxtaposed on the measurement bottom surface 3 of the case 1 respectively.

The mounting portion 6A of the present embodiment comprises a top plate portion 7A into which a magnet body 5 composed of a permanent magnet 5B and a metal plate 5C adsorbed on both front and rear surfaces is inserted from below, and left and right side plate portions 7A.
B, and a support bottom plate 7C having a width for supporting the bottom surface of the permanent magnet 5B is provided at the center of the bottom, and the permanent magnet 5B is made up of the top plate 7A and the support bottom plate 7.
C and the metal plate 5 on the left and right of the permanent magnet 5B.
By adsorbing C, the magnet body 5 is housed and arranged in the mounting portion 6A so as not to come off, and the lower end 5A of the metal plate 5C is held.
Are slightly protruded from the bottom of the mounting portion 6A. Therefore, the mounting of the magnet body 5 can be performed very easily.

The elastic portion 6B is formed by arranging a band-like plate in an arch shape on the upper portion of the mounting portion 6A, and the arch portion has a bending elasticity, so that the magnet mounting member 6 can be mounted in the case body 1. The elastic portion 6B is configured to bend and press against the elastic portion. The elastic portion 6B is integrally formed with resin together with the mounting portion 6A. Reference numeral 11 in the drawing denotes a reinforcing overlay portion provided at a press-contact portion of the elastic portion 6B.

Further, the width of the magnet mounting member 6 is made to substantially correspond to the width of the case 1, and the magnet mounting member 6 is moved along the inner surface of the case 1 in a state of elastic pressure, so that the magnet mounting is performed. The lower end portion 5A of the magnet body 5 projecting from below the member 6 is engaged with the magnet exposure hole 4 by the elastic force,
The magnet mounting member 6 is configured to be locked and fixed to the case 1. With this configuration, the lower end portion 5A of the magnet body 5 that engages with the magnet exposure hole 4 can be prevented from being displaced, and the magnet mounting member 6 can be pushed and inserted without being displaced so much in a pre-positioned state. Although the assembling work can be performed more easily and reliably, in this embodiment,
The width of the mounting portion 6A of the magnet mounting member 6 does not completely match the width of the body case 1, and is slightly narrow with a margin so as to allow smooth insertion.

Therefore, in this embodiment, the magnet mounting member 6 is inserted deeper from the end opening 1A whose cap is closed by the closing member 8 of the body case 1.

At this time, the magnet mounting member 6 is connected to the inner upper surface 10 of the case 1 with the lower end 5A of the magnet 5 slightly projecting from the bottom abutting against the inner bottom surface 9 of the case 1. It is in a state of being held in pressure contact with the bottom surface 9 in an elastic pressure state.

While being pressed against the body case 1 in an elastic pressure state, the body case 1 is pushed inward along the length direction of the body case 1 against the slip resistance caused by the elastic pressure state. The lower end portion 5A of the magnet body 5 automatically falls into and engages with the magnet exposure hole 4 provided on the bottom surface of the magnet body 1 by the elastic force, and the magnet mounting member 6 is locked and fixed in the body case 1. .

Therefore, as described above, the magnet can be automatically mounted and fixed at a predetermined position simply by simply pushing and inserting the magnet mounting member 6 to which the magnet body 5 is mounted.

In addition, since this insertion movement is configured to be pushed into the body case 1 while being pressed against and held in an elastic pressure state, the insertion movement can be performed stably and finely, though the elastic pressure contact is a pushing resistance. At the same time, when the elastic body is automatically inserted to a predetermined position by this elastic force, the magnet body 5
5A engages with the magnet exposure hole 4 and can be pressed and locked.

Further, as in the present embodiment, the magnet mounting member 6 which achieves the above-described functions and effects can be integrally formed of resin, and the mounting of the magnet body 5 to the magnet mounting member 6 is simplified. This is a revolutionary level mounting magnet that is excellent in mass production, easy to assemble, and easy to assemble.

[0031]

Since the present invention is constructed as described above, the magnet mounting member, to which the magnet body is mounted, is pushed into the rear end of the case through the opening at the end of the case to close the cap. The magnet mounting structure in the revolutionary level that can be mounted and fixed in the body case 1 so as to be exposed substantially flush with the magnet exposure hole provided in the above.

In addition, since the insertion movement is performed by pushing the magnet mounting member into the body case while keeping the magnet attachment member pressed against the elastic pressure, the elastic pressure contact acts as a pushing resistance, but the insertion movement is performed with good stability. This is a very innovative magnet in a level that can be reliably and easily performed, and when it is automatically inserted to a predetermined position by this elastic force, the lower end of the magnet body engages with the magnet exposure hole and can be pressed and locked and fixed. Mounting structure.

Accordingly, a magnet mounting structure for a revolutionary level which is extremely simple and practically excellent in practicability can be easily mounted.

According to the second and third aspects of the present invention, the magnet mounting member can be integrally formed of resin, and a magnet body is mounted on the mounting portion of the magnet mounting member and inserted through the end opening of the case body. In this case, the magnet body mounting structure in the level is extremely excellent, which further excels in the assembling workability and reliably exerts the above-mentioned effects.

Further, according to the fourth and fifth aspects of the present invention, it is possible to attach the magnet body to the magnet attaching member more easily, and it is possible to achieve the above-mentioned effects more reliably, and it is an epoch-making and extremely practical. It becomes the magnet mounting structure in the level.

According to the fifth aspect of the present invention, the operation and effect that the magnet mounting member can be automatically mounted and fixed at a predetermined position by inserting and inserting the magnet mounting member from the end opening of the body case. It is better exhibited.

In other words, the lower end of the magnet body engaging with the magnet exposure hole can be prevented from being displaced, and the magnet mounting member can be pushed in without being displaced so much in the pre-positioned state. This is a reliable and extremely innovative magnet mounting structure for a spirit level.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically illustrating the structure of the present invention.

FIG. 2 is an exploded perspective view of a main part of the present invention.

FIG. 3 is a front cross-sectional view for explaining the assembling of the main parts of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body case 1A End opening part 2 Measurement part 2A Measurement bubble tube 3 Measurement bottom surface 4 Magnet exposure hole 5 Magnet body 5A Lower end part 5B Permanent magnet 5C Metal plate 6 Magnet mounting member 6A Mounting part 6B Elastic part 9 Internal bottom surface 10 Internal top surface

Claims (6)

[Claims] 1. A magnet exposure hole is provided in a measurement bottom surface of a case body provided with a measurement unit for measuring horizontality and verticality such as a measurement bubble tube, and a lower end portion of the magnet body is connected to the magnet exposure hole. In a magnet mounting structure in a level which mounts and fixes a magnet body in a body case so as to be substantially flush with the measurement bottom surface, a magnet body is provided with a lower end portion of the magnet body projecting slightly downward. The magnet mounting member is configured to be insertable into the body case through an end opening of the body case, and when the magnet mounting member is inserted into the body case, it protrudes from the bottom of the magnet mounting member. With the lower end of the magnet body in contact with the inner bottom surface of the body case, the magnet body is configured to be pressed against the inner top surface and the inner bottom surface of the body case in an elastic pressure state. While holding the magnet mounting member The lower end of the magnet body is engaged with the magnet exposure hole by inserting and moving, so that the magnet mounting member is locked and fixed in the case body, and the magnet mounting in the spirit level is provided. Construction. 2. The magnet mounting member according to claim 1, wherein said magnet mounting member is provided with a mounting portion for mounting said magnet body at a lower portion, and a flexible deformable elastic portion which presses against an inner upper surface of said case body at an upper portion. The magnet mounting structure according to claim 1, wherein the mounting member is formed of resin. 3. An arcuate elastic portion is provided on an upper portion of a mounting portion for mounting the magnet body to constitute the magnet mounting member.
When the magnet mounting member is inserted through the end opening of the case, the upper portion of the elastic portion is configured to bend the elastic portion against the inner upper surface of the case so as to make elastic contact. The magnet mounting structure in the level according to claim 2. 4. The magnet body has a structure in which a metal plate is attracted to a permanent magnet, and the magnet body is mounted and fixed to a mounting portion of the magnet mounting member, and a lower end of the metal plate of the magnet body is connected to the magnet body. The lower end portion of the magnet is provided so as to protrude slightly downward from the mounting portion, and the lower end portion is configured to engage with the magnet exposure hole. Magnet mounting structure for level. 5. The magnet body adsorbs a metal plate on both sides of a permanent magnet, and has two lower portions, each having a lower end portion of the metal plate as a lower end portion of the magnet body, arranged in parallel with a measurement bottom surface of the housing case. 5. The magnet mounting structure in a level according to claim 4, wherein the magnet mounting holes are configured to engage with the respective magnet exposure holes. 6. The width of the magnet mounting member substantially matches the width of the case body, and the magnet mounting member is moved in an elastic pressure state along the inner surface of the case body. The lower end of the protruding magnet body is engaged with the magnet exposure hole by the resilient pressure, and the magnet mounting member is configured to be locked and fixed to the case body. The magnet mounting structure in the level according to any one of the above.