JP3619606B2 - Variable resistance device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a variable resistance device that is used, for example, when an amount of discharged ice is arbitrarily adjusted in an automatic ice maker or the like.
[0002]
[Prior art]
Conventionally, this type of volume (variable resistor) has been mounted on a mounting surface such as a case wall surface as disclosed in, for example, Japanese Patent Laid-Open No. 4-186701 (H01C1 / 01). A conventional volume mounting structure in, for example, an ice making machine (desktop type chip ice dispenser) will be described with reference to FIG. The volume V (variable resistor) in this case allows the customer to arbitrarily adjust the amount of ice discharged from the ice making machine, and has a variable resistor and a built-in stopper (not shown). It consists of a main body M, a volume shaft S having a semicircular tip section protruding from the main body M, and a holder portion H formed on the main body M of the base portion of the volume shaft S. A screw groove is cut around the holder portion H. It has been.
[0003]
Then, the volume shaft S and the holder part H are passed from the back side through a through hole (not shown) formed in the front panel (attached surface) 100 of the ice making machine, and the hexagon nut N is screwed to the holder part H to screw the front panel 100 surface. The body M of the volume V is fixed to the front panel 100. Thereafter, a knob T was fitted and attached to the tip of the volume shaft S.
[0004]
[Problems to be solved by the invention]
By the way, since the volume V which is normally used for light electrical appliances is used and designed for light loads, its mechanical strength and durability are relatively low. In particular, the torque for rotating the knob T is only about 50 g-cm, for example, and the knob T is easily rotated.
[0005]
On the other hand, since the changeover switch such as ice only / ice and water / water only attached to this type of ice making machine has moderation with three-step changeover (rotational torque is usually 5kg-cm), the customer who operated this changeover switch If the knob T of the volume V for adjusting the amount of ice is turned with the same feeling, it rotates too easily, making adjustment difficult and the feeling of use worsening.
[0006]
Moreover, since the built-in stopper in the main body M is destroyed because it is rotated with an excessive force, the ice is not discharged by being set outside the rotation range (for example, variable to 0 to 20 K ohms in a rotation range of 300 degrees). In the worst case, there is a risk that the volume shaft S is pulled out.
[0007]
The present invention has been made to solve the conventional technical problems, and an object of the present invention is to provide a variable resistance device that is not easily damaged and has improved usability.
[0008]
[Means for Solving the Problems]
A variable resistance device according to a first aspect of the present invention is a volume provided with a main body and a volume shaft projecting from the main body, a knob attached to the tip of the volume shaft, and inserted between the volume shaft and interposed between the knob and the main body. a color that is, to fix the collar to the volume shaft, comprising: a fixing member which projects outwardly from the collar, and a stopper provided in the rotation range of the fixing member with the rotation of the volume shaft, a stopper The collar is slidably brought into contact with the collar .
[0009]
According to the invention of claim 1, the collar is inserted into the volume shaft projecting from the main body, the fixing member for fixing the collar is projected outward from the collar, and the stopper is provided in the rotation range. The rotation range of the volume shaft can be regulated by the contact relationship between the fixing member and the stopper. Therefore, it is possible to effectively avoid inconveniences such as destruction of the main body due to excessive picking, and durability can be improved.
[0010]
In particular, since the stopper is slidably brought into contact with the collar, it is possible to apply an appropriate rotational torque to the knob by the frictional resistance between the stopper and the collar. As a result, it is possible to more effectively prevent a failure due to excessive picking, to facilitate adjustment, and to improve the feeling of use.
[0011]
According to a second aspect of the present invention, there is provided a variable resistance device comprising: a volume including a main body and a volume shaft protruding from the main body; a relay shaft inserted into the volume shaft; a knob attached to a tip of the relay shaft; Is fixed to the volume shaft, and includes a fixing member protruding outward from the relay shaft, and a stopper provided within the rotation range of the fixing member accompanying the rotation of the relay shaft, and the stopper slides on the relay shaft. It is possible to contact .
[0012]
According to the invention of claim 2, the relay shaft is inserted into the volume shaft protruding from the main body, the fixing member for fixing the relay shaft is protruded outward from the relay shaft, and the stopper is provided within the rotation range. Therefore, the rotation range of the volume shaft can be regulated by the contact relationship between the fixing member and the stopper. Therefore, it is possible to effectively avoid inconveniences such as destruction of the main body due to excessive picking, and durability can be improved.
[0013]
In particular, since the stoppers are slidably brought into contact with the relay shaft, an appropriate rotational torque can be applied to the knob by the frictional resistance between these stoppers and the relay shaft. As a result, it is possible to more effectively prevent a failure due to excessive picking, to facilitate adjustment, and to improve the feeling of use.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a perspective view of an ice making machine 1 (desktop chip ice dispenser) as an embodiment to which the present invention is applied, FIG. 2 is a perspective view of a variable resistance device 2 portion of the present invention, and FIG. 4 is a cross-sectional view taken along the line OO in FIG. In each figure, the same reference numerals as those in FIG. 7 are the same.
[0015]
The ice making machine 1 according to the embodiment is a so-called table-type chip ice dispenser that provides cold water to customers in a restaurant or the like, for example, and an auger type automatic ice making unit and a water cooler are incorporated in the outer case 3. Yes. The front panel 3A (attached surface) of the outer case 3 has a selector switch 4 for switching between ice only / ice and water / water only, and the amount of ice discharged from the automatic ice making unit (shutter of the ice storage). A knob T of the variable resistance device 2 of the present invention for adjusting the opening time is provided.
[0016]
A water supply / ice discharge part 6 is provided below the front panel 3A, and a spider 7 is attached below the water supply / ice discharge part 6. Then, when injecting cold water (with or without ice) into the cup C, the customer places the cup C on the basket 7 below the water supply / ice discharge unit 6 and sets the selector switch knob 4 to three. Rotate in stages to switch between discharging only ice, discharging ice and water, or discharging only water. The knob T is turned to arbitrarily adjust the ice discharge amount.
[0017]
Next, the mounting structure of the variable resistance device 2 of the present invention will be described. The variable resistance device 2 according to the embodiment includes a main body M having a variable resistance and a built-in stopper (not shown), a semicircular volume shaft S protruding from the main body M, and a main body M of the base of the volume shaft S. A volume (variable resistor) V, a knob T, a collar 9, and a fixing screw 11 as a fixing member, each of which is formed of a holder portion H (a screw groove is cut around the holder portion H). And a volume fixing plate 8 and a stopper 12.
[0018]
The volume fixing plate 8 has a substantially gate shape, has mounting holes 8A and 8A on the front surfaces of both ends discharged forward, and a through hole (not shown) is formed in the retreated central portion. Then, the volume shaft S of the volume V and the holder portion H are passed through this through hole from the rear, and the hexagon nut N is screwed to the holder portion H to tighten the volume fixing plate 8 and the main body M. Fix to the volume fixing plate 8.
[0019]
On the other hand, the collar 9 is made of a metal cylinder, for example, a half-moon-shaped or circular through-hole 9A that matches the cross-sectional shape of the volume shaft S, and a screw hole that passes through a wall (a wall having a flat inner surface in the case of a half-moon shape). 9B. Before attaching the knob T, after inserting the volume shaft S through the through hole 9A and inserting the collar 9, the fixing screw 11 is screwed into the screw hole 9B and applied to the volume shaft S so that the collar 9 is attached. The volume shaft S is fixed so as not to rotate. In this state, the fixing screw 11 protrudes outward from the collar 9 (in the radial direction of the collar 9).
[0020]
On the other hand, the stopper 12 is screwed in the vicinity of the through hole of the volume fixing plate 8. The stopper 12 has a cylindrical shape, protrudes in the same direction as the volume shaft S, is located within the rotation range of the fixing screw 11 accompanying the rotation of the volume shaft S, and its side surface slides on the side surface of the collar 9. It is movably touched. As a result, the volume shaft S can be rotated within a range in which the fixing screw 11 contacts both surfaces of the stopper 12 as shown in FIG. 3, but the angle is set to be the same as or within the rotation range of the built-in stopper. .
[0021]
After assembling in this way, with the volume shaft S protruding forward from the through hole 3B formed in the front panel 3A, both ends of the volume fixing plate 8 are brought into contact with the back surface of the front panel 3A, and the mounting holes 8A, Secure 8A with screws. Thereafter, a knob T is fitted and attached to the tip of the volume shaft S. At this time, the collar 9 is interposed between the front panel 3A and the main body M (that is, between the main body M and the knob T), and the front end surface of the collar 9 is slidably in contact with the back surface of the front panel 3A.
[0022]
As described above, in the present invention, the collar 9 is inserted into the volume shaft S protruding from the main body M, and the fixing screw 11 for fixing the collar 9 is protruded outward from the collar 9, and the stopper 12 is within the rotation range. Therefore, the rotation range of the volume shaft S can be regulated by the contact relationship between the fixing screw 11 and the stopper 12. Therefore, it is possible to effectively avoid inconveniences such as the destruction of the main body M due to the knob T being turned too much, and the durability can be improved.
[0023]
Further, since the stopper 12 is slidably in contact with the collar 9, an appropriate rotational torque is applied to the knob T by the frictional resistance between the stopper 12 and the collar 9. As a result, it becomes possible to more effectively prevent a failure due to overturning of the knob T, to facilitate adjustment, and to improve the feeling of use.
[0024]
Further, since the end face of the collar 9 is slidably in contact with the front panel 3A, the same rotational torque is applied to the knob T by the frictional resistance between the front panel 3A and the collar 9. As a result, it is possible to more effectively prevent a malfunction due to excessive turning of the knob T, to improve the adjustment operability and the feeling of use, and to effectively prevent the inconvenience that the volume shaft S is pulled out. It becomes like this.
[0025]
If the collar 9 is attached when the volume shaft S of the volume V is short, the knob T cannot be attached. In that case, a relay shaft 21 is used instead of the collar 9 as shown in FIGS.
[0026]
The relay shaft 21 includes a cylindrical large-diameter portion 22 having the same thickness as the collar 9 and a half-moon-shaped knob mounting portion 23 protruding from the center of one end of the large-diameter portion 22. A half-moon-like engagement hole 22A is provided at the center of the other end, and a screw hole 22B that penetrates a wall (a wall in which the half-moon-like inner surface of the engagement hole 22A is a flat surface) is provided.
[0027]
Before attaching the knob T, after inserting and engaging the tip of the volume shaft S into the engagement hole 22A and inserting the relay shaft 21, the fixing screw 11 is screwed into the screw hole 22B and attached to the volume shaft S. The relay shaft 21 is fixed to the volume shaft S so as not to rotate. In this state, the fixing screw 11 protrudes outward (in the radial direction of the large diameter portion 22) from the relay shaft 21.
[0028]
The stopper 12 is similarly positioned within the rotation range of the fixing screw 11 accompanying the rotation of the relay shaft 21, and its side surface is slidably in contact with the side surface of the large diameter portion 22. As a result, the relay shaft 21 and the volume shaft S can be rotated within the range where the fixing screw 11 abuts on both surfaces of the stopper 12 as in FIG. 3, but the angle thereof is the same as the rotation range of the built-in stopper. Set within the rotation range.
[0029]
After assembling in this way, with the knob mounting portion 23 of the relay shaft 21 protruding forward from the through hole 3B formed in the front panel 3A, both ends of the volume fixing plate 8 (in this case, both ends of FIG. The front and rear dimensions are expanded) are brought into contact with the back surface of the front panel 3A, and fixed to the mounting holes 8A and 8A through screws. Thereafter, a knob T is fitted and attached to the tip of the knob attachment portion 23 of the relay shaft 21. At this time, the front end surface of the large diameter portion 22 is slidably in contact with the back surface of the front panel 3A.
[0030]
Even in the structure in this case, the relay shaft 21 is inserted into the volume shaft S protruding from the main body M, and the fixing screw 11 for fixing the relay shaft 21 is protruded outward from the relay shaft 21 to be within the rotation range. Since the stopper 12 is provided, the rotation range of the volume shaft S can be regulated by the contact relationship between the fixing screw 11 and the stopper 12. Therefore, it is possible to effectively avoid inconveniences such as the destruction of the main body M due to the knob T being turned too much, and the durability can be improved.
[0031]
Further, since the stopper 12 is slidably in contact with the large diameter portion 22, an appropriate rotational torque is similarly applied to the knob T due to the frictional resistance between the stopper 12 and the relay shaft 21. As a result, it becomes possible to more effectively prevent a failure due to overturning of the knob T, to facilitate adjustment, and to improve the feeling of use.
[0032]
Further, since the front end surface of the large-diameter portion 22 is slidably in contact with the front panel 3A, the same rotational torque is applied to the knob T by the frictional resistance between the front panel 3A and the relay shaft 21. As a result, it is possible to more effectively prevent a malfunction due to excessive turning of the knob T, to improve the adjustment operability and the feeling of use, and to effectively prevent the inconvenience that the volume shaft S is pulled out. It becomes like this.
[0033]
In the embodiment, the present invention is applied to an ice making machine. However, the present invention is not limited to this, and the present invention is effective for various devices for attaching a volume. In addition, the fixing member is not limited to the fixing screw 11 of the embodiment, but may be configured by a pin that is driven into the collar 9 or the relay shaft 21 to be fitted.
[0034]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, the collar is inserted into the volume shaft projecting from the main body, and the fixing member for fixing the collar is projected outward from the collar, and the stopper is disposed within the rotation range. Thus, the rotation range of the volume shaft can be regulated by the contact relationship between the fixing member and the stopper. Therefore, it is possible to effectively avoid inconveniences such as destruction of the main body due to excessive picking, and durability can be improved.
[0035]
In particular, since the stopper is slidably brought into contact with the collar, it is possible to apply an appropriate rotational torque to the knob by the frictional resistance between the stopper and the collar. As a result, it is possible to more effectively prevent a failure due to excessive picking, to facilitate adjustment, and to improve the feeling of use.
[0036]
According to the invention of claim 2, the relay shaft is inserted into the volume shaft protruding from the main body, the fixing member for fixing the relay shaft is protruded outward from the relay shaft, and the stopper is provided within the rotation range. Therefore, the rotation range of the volume shaft can be regulated by the contact relationship between the fixing member and the stopper. Therefore, it is possible to effectively avoid inconveniences such as destruction of the main body due to excessive picking, and durability can be improved.
[0037]
In particular, since the stoppers are slidably brought into contact with the relay shaft, an appropriate rotational torque can be applied to the knob by the frictional resistance between these stoppers and the relay shaft. As a result, it is possible to more effectively prevent a failure due to excessive picking, to facilitate adjustment, and to improve the feeling of use.
[Brief description of the drawings]
FIG. 1 is a perspective view of an ice making machine as an embodiment to which the present invention is applied.
FIG. 2 is a perspective view of the variable resistance device of the present invention.
3 is a cross-sectional view taken along line AA in FIGS. 2 and 5. FIG.
4 is a cross-sectional view taken along the line OO in FIG. 2. FIG.
FIG. 5 is a perspective view of another variable resistance device according to the present invention.
6 is a cross-sectional view taken along line OO in FIG.
FIG. 7 is a diagram illustrating a conventional volume mounting structure.
[Explanation of symbols]
2 Variable resistance device 8 Volume fixing plate 9 Collar 11 Fixing screw (fixing member)
12 Stopper 21 Relay shaft M Body S Volume shaft T Knob V Volume

Claims (2)

A volume provided with a main body and a volume shaft protruding from the main body, a knob attached to the tip of the volume shaft, a collar inserted into the volume shaft and interposed between the knob and the main body, and this collar A fixing member that is fixed to the volume shaft and protrudes outward from the collar ; and a stopper that is provided within a rotation range of the fixing member accompanying the rotation of the volume shaft. A variable resistance device that is slidably contacted . A volume including a main body and a volume shaft protruding from the main body, a relay shaft inserted into the volume shaft, a knob attached to the tip of the relay shaft, and fixing the relay shaft to the volume shaft, A fixing member projecting outward from the relay shaft; and a stopper provided within a rotation range of the fixing member accompanying the rotation of the relay shaft, the stopper being slidably contacted with the relay shaft. A variable resistance device characterized by that.

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