JP2016147035A - Clothespin handled with one hand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clothespin which allows a user to hang out the laundry to dry by one hand since it does not use a metal spring but uses flexibility of resin and therefore opening/closing force of the clothespin is lightened and a fastening part is kept in the open state.SOLUTION: There is provided a clothespin handled with one hand which comprises a fitting part having a shaft and a hole at the center, a fastening part for fastening the laundry at one end, an upper pinching part for opening the fastening part at the other end, and a slide hole and a slide shaft with a thin arm generating a spring effect between the fitting part and the upper pinching part. The outside of the fastening part has a shape to be easily pinched and one piece being a lower pinching part is connected to the other one piece at the fitting part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laundry scissors that can open and close the pinching portion at the tip with a little force and can attach the laundry with only one hand.

Conventionally, most of the clothespins used a C-shaped or rectangular metal spring.
And what can maintain the clamping part of a clothespin (refer patent document 1), (refer patent document 2), the thing made from a total synthetic resin (refer patent document 3), (refer patent document 4), etc. is there.

  JP 2013-85945 A   JP 2005-28072 A   Japanese Utility Model Publication No. 7-27486   JP 2002-355497 A

This has the following drawbacks.
The prior art disclosed in Patent Document 1 has the same problems of reducing the opening / closing force and maintaining the open / close state of the clamping part, but uses a C-type metal spring, which slides and has a problem of hitting a finger.
Although the prior art disclosed in Patent Document 2 can be operated with one hand, there is a point that cannot be mass-produced in terms of shape.
The prior art disclosed in Patent Document 3 is a product of total synthetic resin, but because it has the same structure as a general laundry scissors, it cannot maintain the open / closed state, and it is a combination of several resins, so mass productivity is still Absent.
The prior art disclosed in Patent Document 4 is an integrally molded resin product, but if the pin is made of resin, the strength is weakened. If this pin is made of a metal pin, the meaning of the integral molding is lost and the cost is increased.

Most of the current clothespins have a structure in which the clamping portion is closed with a C-shaped or rectangular metal spring.
"Fig. 2" is a graph showing the force applied to the knob and the opening width when opening the holding parts of seven kinds of clothespins (A to G) using a commercially available metal spring. It can be seen that when closed, the spring force is minimal and requires more force as the clamping part opens.
Since the laundry is difficult to dry unless the clamping part is opened by 10 mm or more, the force of the fingertips of about 1 kg is required for any clothespin.
The same applies to clothespins using coil springs.
In these clothes springs using metal springs, it is ideal not to use more force than the opening size of the holding part when the laundry is stopped. Impossible.

In addition, these clothespins, when the resin is deteriorated, when the clamping part is opened, a large force is applied to the contact point between the metal spring and the resin, so that many of the clothespins break from the vicinity of the spring, Life was short.
And since one hand is necessary to open the clamping part, it was impossible to attach the laundry with only one hand.
The present invention has been made to solve the above problems.

The present invention is a laundry scissors in which two sandwich pieces having the same structure and shape are fitted to each other in the opposite direction.
Hereinafter, the structure of one of the sandwich pieces in the suspended state will be described.
There is a fitting part having a shaft and a hole for connecting two pieces in the center, a holding part for sandwiching the laundry at one end, and an upper knob part at the other end.
Between the fitting part and the upper knob part, there is an elongated slide hole and a slide shaft that moves the other slide hole at the end / outside position of the slide hole. The shaft has a thin arm to create a spring effect.
The outer side of the clamping part is a lower knob part that is shaped to be easily picked.
A pair of scissors as a whole is completed by fitting the two pieces formed in this way in the opposite direction and facing left and right.
The present invention is a clothespin that can be operated with only one hand constructed as described above.

Can satisfy all the effects of Patent Documents 1 to 4,
(A) Since the small spring property of the resin is used, it can be operated with a small force when hanging or removing the laundry without using a large force unnecessarily.
(A) Since a strong metal spring is not used, it is not easily broken.
(C) This product keeps the clamping part open, has a lower knob, and has a small opening and closing force, so the laundry can be easily dried with just one hand.
(D) The force to pinch the laundry can be freely determined by the design of the shape of the sliding hole, sliding shaft arm, etc., so it can be freely made from small to large holding force of the clamping part I can do it.
(E) The holding part can be opened more widely than a conventional clothespin, making it easier to dry the laundry.
(F) For those who do not have fingertip strength, it is possible to reduce the force of the fingers used for opening and closing while maintaining the holding force of the clamping portion by lengthening the upper and lower knobs.
(G) Since only two identical parts made of synthetic resin are fitted, an inexpensive mass-produced product can be produced.
(H) Since it is only resin that does not contain metal, it is an eco-friendly product that is friendly to the global environment.
(I) If the sliding shaft arm is made of a stainless steel leaf spring and the other is made of a metal such as aluminum, stainless steel, titanium, etc., it is possible to make a high-grade laundry scissors that can be used semi-permanently.

  The perspective view which shows the state which opened the clamping part in this invention   A graph showing the opening size of the holding part of a general clothespin and the force applied to the knob at that time   1 is a perspective view of one of two main pieces constituting the present invention and a sandwiching piece.   The figure showing the positional relationship between the sliding hole and the sliding shaft, which is a part of the present invention, and the angle from the center of the fitting portion   The front view which showed the opening width of the clamping part which is a part of this invention   In the present invention, a perspective view showing a state immediately before the insertion of two sandwich pieces   Sectional drawing which shows the state at the time of the assembly of the fitting part which is a part of this invention

In the present invention, two clip pieces (1a) having a shape as shown in FIG. 3 are fitted together, and the clip piece (1a), which is one piece, can rotate two clip pieces in the center. There is a fitting part (8) having a shaft and a hole for connection in a state, a clamping part (2) for sandwiching laundry at one end, and an upper knob part for opening the clamping part (2) at the other end (3) Between the center fitting part (8) and the upper knob part (3), there is an elongated slide hole (5), and a slide shaft (6) that moves through the slide hole. The shaft (6) is provided with a thin arm and a sliding shaft arm (7) that can produce a spring effect.
Moreover, in order to make it easy to close a clamping part (2), the clamping part outer side becomes a shape which is easy to pick with a finger as a lower knob part (4).
The sliding hole (5) and the sliding shaft (6) are combined with the other one piece, and have a head with a diameter larger than the shaft at the upper part of the sliding shaft to prevent lifting and slipping off due to the spring force. In the lower part of the sliding hole (5), a groove having a width that allows the head to slide and a hole through which the head can penetrate when assembled are provided.
It is a sandwiching piece having each part having the above-described functions, and the present invention is configured so that one of the sandwiching pieces (1b) of the two sandwiching pieces is sandwiched around the fitting part (8). And 180 ° and connected to the other clip piece (1a) at the fitting portion.

  When using this, first pick the upper picking part (3) with your finger and open the holding part (2). Normally, after removing the laundry, the holding part (2) is in the open state. Then, the laundry is inserted, and the lower picking portion (4) is picked with a finger to sandwich the laundry.

Next, the relationship between the sliding hole (5), the sliding shaft (6), and the sliding shaft arm (7) that plays the role of a spring will be described.
In each sliding hole (5), the sliding shaft (6) of the other pinching piece is inserted, and the sliding hole (5) is a locus of the sliding shaft at the upper end portion when no load is applied. In contrast to (14), in order to produce a spring effect, it is designed as shown in FIG.
When the holding part (2) is in the open position (A) of the sliding shaft, the holding part (2) is opened to the maximum. At this time, the no-load locus (14) of the upper end of the sliding shaft. Since a part of the outer periphery of the sliding shaft is in contact, no force is applied to the sliding shaft arm (7).
For this reason, a clamping part (2) will maintain an open state.
Next, when the lower picking part (4) is picked with a finger and a force is applied, the sliding shaft (6) follows the sliding hole (5) at a certain force, and is applied to the holding part. The force moves to the position (B) of the sliding shaft when switching between opening and closing.
When the sliding shaft (6) moves to the position (B) of the sliding shaft when switching to opening and closing, the sliding shaft arm (7) is bent to the maximum, and the force (13) acting on the sliding shaft is generated. It becomes the largest in the direction of the arrow, and inertial force is also applied thereto, and the sliding shaft (6) moves in the direction of the position (C) of the sliding shaft in the closed state at once.
When the sliding shaft (6) moves to the position (C) of the sliding shaft in the closed state, the clamping portion (2) is completely closed and the laundry is held.
When removing the laundry, the upper knob (3) is picked with a finger, and as the force is applied, the sliding shaft (6) slides from the position (C) of the sliding shaft when closed to the open / close state. It moves to the position (B) of the moving shaft, and when it passes this point, it moves to the position (A) of the sliding shaft in the open state at once.
When the sliding shaft (6) is between the position (A) of the sliding shaft when the sliding hole (4) is open and the position (B) of the sliding shaft when switching to open / close, the clamping part (2 ) Force is applied in the opening direction, and when it is between the position (B) of the sliding shaft when switching to opening and closing, and the position (C) of the sliding shaft when closed, the clamping part (2) The force works in the closing direction.
The side surface of the sliding hole (5) and the side surface of the sliding shaft (6) need to be smooth in order to allow the clamping portion (2) to open and close smoothly.

Next, the opening width and clamping force of the clamping part (2) will be described.
From FIG. 5, the maximum opening width (W1) of the clamping part is determined by the shortest distance (L) of the clamping part from the center of the fitting part and the angles A and C (θ1) from the center of the fitting part. W1≈2πL × θ1 / 360, and the opening width (W2) at which the clamping portion can be tightened is the shortest distance (L) of the clamping portion from the center of the fitting portion, and B and C from the center of the fitting portion. From the angle (θ2), W2 <2πL × θ2 / 360.
In the design, in order to increase the tightenable opening width (W2), the shortest distance (L) of the clamping portion from the center of the fitting portion, and B, C from the center of the fitting portion that can be tightened What is necessary is just to enlarge an angle ((theta) 2).
In addition, the clamping force of the clamping part (2) varies depending on the position of the sliding shaft, the width, length and height of the sliding shaft arm (7), and the material.
The pinching force varies greatly depending on the shape and position of the sliding hole (5).

Finally, the structure of the fitting part (8) and the assembly method will be described.
As can be seen from FIG. 3, the fitting portion (8) has a hole for receiving the shaft and a fitting portion hole (10) at the lower part, and one end has two notches and is thin to bend easily. There is a fitting part cutout part (12).
The middle part is in the shape of a fan and is connected to the upper shaft and the fitting part shaft (9) and has a conical taper (11) below it, so that two pieces can be connected and rotated. .
As shown in Fig. 6, rotate one pinch piece 180 degrees and insert the other sliding shaft head into the large hole of the sliding hole (5). Match part (8).
A conical taper (11) is provided under the fitting portion shaft (9). When a force is applied to push in, the fitting portion notch portion (12) is formed as shown in FIG. After being bent outward and the shaft is inserted into the hole, the notch (12) of the fitting portion is restored to complete the connection.
The built-in will not come off unless destroyed.

DESCRIPTION OF SYMBOLS 1a Clamping piece 1b Clamping piece 2 Clamping part 3 Upper knob part 4 Lower knob part 5 Sliding hole 6 Sliding shaft 7 Sliding shaft arm 8 Fitting part 9 Fitting part shaft 10 Fitting part hole 11 Conical taper 12 Fitting Joint notch 13 Force acting on the sliding shaft 14 Trajectory at the top of the sliding shaft when there is no load A Position of the sliding shaft in the open state B Position of the sliding shaft when switching to open / close C C in the closed state Sliding shaft position L Shortest distance of clamping part from center of fitting part θ1 Angles of A and C from center of fitting part θ2 Angles of B and C from center of fitting part W1 Maximum opening width W2 Opening that can be tightened width

Claims (1)

  Two scissors that have exactly the same structure and shape as each other are a pair of scissors that are fitted on the left and right sides. The one scissor piece has a shaft and a hole for connecting the two pieces in the center. There is a fitting part that holds the laundry at one end, an upper knob part at the other end, and an elongated sliding hole and a sliding hole between the fitting part and the upper knob part. There is a sliding shaft that moves, a thin arm is attached to the sliding shaft, and the outside of the clamping part is a lower knob part that is shaped to be easily picked.Two of the clamping pieces formed in this way are turned upside down. Laundry scissors that can be operated with only one hand, and are completed by fitting them side by side.

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