JPS5949153A - Device for holding exchangeable component - Google Patents

Abstract

PURPOSE:To enable a supported component to be simply attached or detached by heating a pressing member holding the exchangable component to the phase transition temperature of the pressing member without changing its state of the attachment, by forming the pressing member by the use of a shape-memorizing alloy. CONSTITUTION:A pressing member 10 is formed by the use of a shape-memorizing alloy having a phase transition temperature characteristic. It has a curved section 11 at one end, so that a component 14 can be exchanged by directly pulling up the end 10b of the pressing member 10 in the holding-releasing direction (upward in the figure) without loosening a screw 12. Here, the pressing member 10 left at ordinary temperature may be pulled up in the hold-releasing direction by giving external force to the end 10b. Alternatively, the component 14 can be simply exchanged by easily deforming the pressing member 10 by softening it through its phase transmission caused by cooling it to below its phase transition temperature (-10 deg.C) by, for example, spraying it with liquefied gas.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a holding mechanism for parts that occasionally require replacement in IchiikejηS products used in suitable Shigeko products such as Shigeko watches, or other suitable products.
The present invention relates to a replacement part holding device that uses a shape memory alloy as a presser for holding the replacement part.

Conventionally, when assembling small parts such as a button battery into a suitable product such as a Juko watch, for example, the first
As shown in the figure, the component 1 was held by fixing the presser 2 of the component 1 to a substrate 4 or the like with screws 3.

Therefore, in order to assemble the component 1 onto the board 4, each time the screw 3 is loosened and the holding tool 2 is removed, the loosened holding tool 2 is rotated to the side to insert and remove the component 1, and then the part 1 is inserted and removed again. The presser 2 had to be fixed by returning the presser 2 to the set position and tightening the screw 3. Therefore, requiring such a means to replace parts is extremely troublesome to handle.

Furthermore, as shown in FIG. 2, there is a holding device that does not use fixing screws and allows the presser 2a to be moved to the horizontal position using the pivot 5 as a fulcrum, but in this case, the presser is returned to the set position. The tip of 2a has a suitable locking structure, and the locking portion 2'
This requires the troublesome assembly of having to engage the main body 4a (il!l), and a shape-retaining structure for this purpose.

On the other hand, as a holding means that facilitates the attachment and detachment of replacement parts, for example, as shown in FIG.
(There are some configurations that allow contact with one surface.)

However, with this type of configuration, the top surface of the display remains open. 3. It is necessary to prevent the parts (for example, heavy oil) from falling with a lid or the like. For this reason, when moving and inspecting a Shigeko watch as a module, for example, the holding parts tend to come off easily, resulting in the inconvenience of having to set the time and mode all over again. The problem is that it is easy.

This invention is based on the above-mentioned conventional example, and its gist is that a presser for holding a replacement part is made of a shape memory alloy, and the presser made of the shape memory alloy is, for example, Although one end of the presser is fixed to the board side with a screw as in the conventional structure shown in FIG. If it is installed as is, the phase transition temperature characteristics will be exhausted or -! , by applying external stress to the presser in the normal temperature range to warp it in the direction of releasing the hold, so that the holding part can be easily removed or attached. To provide a holding device capable of automatically restoring a shape memory state at room temperature without special restoration, and capable of accurately holding a replacement part.

Next, the present invention will be explained based on embodiments shown in the drawings. The shape memory alloy used in the following examples is, for example, an alloy made of titanium and nickel made of plate material.
The temperature at which shape memory undergoes a phase transition is determined to be below -10°C. For this reason, this shape memory alloy naturally exhibits a shape memory effect at room temperature, and produces a superelastic phenomenon in which it immediately returns to its original memorized shape when an external force is removed.

FIG. 4(a) shows a bending part 11 provided at one end of a presser 10 made of a shape memory alloy having the above-mentioned phase transition temperature characteristics, and its base end 10af: a substrate Inc is fixed with a screw 12, and a component (for example, heavy oil) is attached to the base end 10af. Reference numeral 14 is a conductive piece that can be held integrally with the substrate 13. Reference numeral 15 is a conductive piece disposed within the component storage portion 17 of the main body 16.

In the above, the presser 10 has a free end 10b, and has a memorized shape made of a shape memory alloy, and at room temperature, the presser 10 is pressed against the upper surface of the item 14 as shown in the figure with elasticity that returns to the memorized shape. ing.

Therefore, the part 14 is held down by the elasticity of the presser 10.
in electrical contact with i? (The item 14 is held by this presser lO without falling off.)

FIG. 4(b) shows a state in which the tels product 14 shown in the above embodiment is replaced.
Without loosening, directly lift the tip 1obl of the presser lO in the direction of releasing the hold (upward in Figure 4).

In this case, the presser 10 is kept at room temperature and the tip lOb is
Apply an external force to lift it in the holding release direction, or cool the presser 10 to a low temperature below the phase transition temperature (-10° C.) by, for example, blowing liquefied gas onto the presser 1G. For example, a phase change S occurs in the presser 10 and the presser 10 can be softened, the presser 10 can be easily deformed, and the parts 14 can be easily replaced. Therefore, when the presser 10 softens due to this phase transition, it can be easily replaced by replacing the component 14 until it gradually returns to its shape memory state.

If the presser 10 is left as it is after replacing the part 14, the presser 10 will exceed the phase transition temperature and return to the shape memory state in the process of returning to room temperature, and the part 14 will be automatically held. Can be accurately restored to the retained state.

Next, a case will be described in which the phase transition of the shape memory alloy constituting the presser lO using the holding bag of the present invention is set at a temperature vc of 60° C. or more. The example is shown in Figure 4 (
A) and FIG. 4(b) will be used for explanation.

In this case, the shape memory state of the presser lO is stored in the shape of the holding released state, for example, as shown in FIG. 4(b). And, ff19 item 14K gold prescribed I'! When assembling the part 10 into the machine, the presser lO is returned to a so-called shape memory state by heating the presser 10 using hot air or a heater, and when the holding in this state is released, the part 1
4 at a predetermined position 1i't. Next, presser 10
As the temperature decreases to room temperature, as shown in FIG. 4(a), the presser lO, which has softened due to room temperature, is plastically deformed by applying an external force to the holding position 1i'C of the part 14. The part 14 is held by holding the part 14. In this case, 1Vj
If the product 14 is heavy oil, such as a heavy duty watch, for example, it is desirable from the standpoint of reliability to have a configuration in which the presser 10 is pressed in the holding direction auxiliary with the back cover of the container or the like.

Further, in the above, the shape memory alloy forming the presser lO may be formed using a shape memory alloy having a reversible shape effect. This reverse shape effect is a phenomenon in which the shape memory alloy returns to its memorized shape when it reaches a temperature above its phase transition temperature, and conversely, when it is cooled, the shape memory alloy returns to its plastically deformed state. It is.

Therefore, if the presser lO is made of a shape memory alloy with such a reversible shape effect, the holding of the presser 10 can be released by raising the temperature, and the part 14 can be removed by cooling the presser lO to room temperature.
The parts 14 can be appropriately used for holding the parts 14, and the parts 14 can be easily replaced by simply controlling the temperature.

The embodiment shown in FIG. 5 is a case where the bent portion 11a of the presser 10 is curved away from the component 14, and by configuring the presser 10 in this way, the presser lO is heated with a heater or the like. This eliminates the inconvenience of unnecessarily heating the component 14 when doing so.

The embodiment shown in FIG. 6 is a case in which a plurality of pressers 18 and 188 are provided as a pair, and the material is the same shape memory alloy as in the previous embodiment.

Note that only one of the pressers 18 and 18a may be made of a shape memory alloy.

In this case, by heating one of the pressers 1B (or 1sa) made of a shape memory alloy, the component 14 can be released and held in the same manner as in the previous embodiment.

In addition, when only one presser foot is made of a shape memory alloy, there is an advantage that the material cost can be saved. .

The embodiment shown in Fig. 7 is a presser! This is a case in which the shape memory alloy 20 is used in 9-191.

Therefore, according to this embodiment, the presser 19 can be constructed using the shape memory alloy only in the portion of the presser 19 that is essentially desired to be deformed, so that the material cost of the shape memory alloy can be saved as described above. . Note that 19'Q is the spot welded part.

In the embodiment shown in FIG. 8, a thin film 22 made of a highly conductive TI'f body with low air-bacteria contact resistance is attached to one side (or both sides if necessary) of a presser 21 made of a shape memory alloy. This is a case where it is provided in multiple layers by adhesion, plating, or other appropriate means.

Therefore, according to this embodiment, when the presser zrt-m air circuit is used, for example, when it is brought into contact with the printed surface of the board 13 and fixed with the screw 12, the presser 21 and the board 13 are
Good electrical connection can be maintained between the electric circuit and the replacement part 14.

Note that the method of using the presser 21 is the same as in the other embodiments. Since this invention is as described above, it can be used as a replacement for 9 items, such as a Shigeko watch, a game that has a Shigeko watch, a camera, or other suitable items. Appropriate parts such as heavy oil or liquid crystal panels used in products with high performance can be easily replaced and maintained.

Further, according to the present invention, it is extremely convenient to hold parts that need to be replaced, such as fuses and pilot lamps used in the above-mentioned other public air circuits, and the effect in use is great. Of course, the holding of the above-mentioned parts is not limited to those used in electric circuits, and the same effect can be applied to, for example, a holding mechanism for a filter used in an r-pass filter.

Therefore, in this invention, only nl + simple is sufficient for the configuration, and it can be used to replace the existing structure with a shape memory alloy presser that can be configured into the same shape as this, so it can be used not only for new products but also for new products. Existing products can also be easily replaced with the retaining device of the invention and can be suitably improved, providing G-advantages.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of a conventional part holding system with 1 cedar island, and Figs. 2 and 3 are 11! ! , 4I/IJ explanatory diagram. FIG. 4(a) is an explanatory diagram showing an example of the embodiment of the present invention, FIG. 4(b) is an explanatory diagram of the operation of the presser shown in FIG. 4(a), and FIGS. 5 to 8 are respectively It is a 8j♂ light diagram showing the north side of the presser. 10-18-183-19-21 ・=-・・Presser foot,
14... Parts, 22... Rt' membrane. Patent Applicant Lif-11' JRt Aji Shiki Company Agent, Patent Attorney Shun Nakao Bunpen 1 Figure 2 Figure 3b Figure 4 Figure 4 Figure 5i! f 14th 9th figure 6th figure 7th figure 8th figure

Claims (2)

[Claims] (1) In the configuration in which the replacement part is held by a presser, the presser for holding the replacement part is made of a shape memory alloy. A holding device for replacement parts configured to be able to be held under pressure with elasticity. (2) A holding device for a replacement part of the IJU 111εI diary/1Q as claimed in the patent, in which a presser made of a shape memory alloy is provided with a thin 11f layer of good conductivity on the surface of the shape memory alloy.