JP3223148U - Digital bow scale - Google Patents

Abstract

A small digital bow balance capable of easily measuring the tension of a string at an arbitrary place is provided. A digital bow balance 1 has a strain gauge, a timer, a control IC, a battery, and the like, and is a rod-shaped body having a pressure receiving portion 2, a digital display portion 3, and a power switch 4 arranged on the upper surface. The digital balance 5 is provided. The pressure receiving portion of the digital balance 5 is replaced by a pressure receiving portion 2 having a narrow groove 6 through which the bow string passes on the surface, and is inclined with respect to the longitudinal axis X of the digital bow balance 1 to form the narrow groove 6. And the step 7 in the groove longitudinal direction is formed on both sides of the groove 6 near the both ends in the longitudinal direction of the narrow groove 6. A finger hooking member 8 having a thin central portion in the longitudinal direction and a thick thickness at both ends is fixed to the surface of the digital scale 5 opposite to the surface on which the pressure receiving portion 2 is disposed. The concave part formed by the thin part of the finger hanging member 8 forms a finger hanging part 9 for hanging four fingers from the index finger to the little finger when pulling the bow, and the user's middle finger, ring finger and little finger are inserted into the finger hanging part 9 A handle 10 forming a hole 10a is fixed. [Selection] Figure 1

Description

The present invention relates to a small digital bow balance that measures the tension of a bowstring.

A small-sized digital bow balance of a hanging scale type is commercially available. When using the digital bow balance, engage the ring attached to one end of the main body with the support fixed to the pillar, etc., and connect the hook attached to the other end of the main body to the center in the longitudinal direction of the bowstring. , Hold the bow in your hand, pull the bow until it is full, and in that state, visually check the digital value displayed on the display of the main unit and check the string tension, more precisely the string tension bow Measure the component force in the direction perpendicular to.

The conventional small digital bow balance requires a support for engaging the ring and a structure for fixing the support during measurement, and the ring needs to be engaged with the support during measurement. Therefore, there is a problem that the string tension cannot be easily measured at an arbitrary place.
The present invention has been made in view of the above problems, and an object thereof is to provide a small digital bow balance capable of easily measuring the tension of a string at an arbitrary place.

In order to solve the above-mentioned problems, the present invention provides a palm-sized digital bow balance characterized in that a narrow groove through which a bow chord passes is formed on the surface of a pressure receiving portion.
The digital bow balance according to the present invention has a rod-shaped body with a pressure sensor on a palm-sized commercially available digital balance, more specifically, a wide concave portion on the surface for engaging a handle of a travel bag or a string that binds luggage. A bow balance configured by replacing the formed pressure receiving portion with a pressure receiving portion having a narrow groove through which a bow chord passes.
Put your finger on the digital bow balance according to the present invention with your hand holding the string, engage the string with the narrow groove on the surface of the pressure receiving part, draw the bow fully until it is full, and adjust the string tension displayed digitally Visually check. If the digital bow balance according to the present invention is used, the tension of the string can be easily measured at an arbitrary place.

In a preferred embodiment of the present invention, the digital bow balance is provided with a control device that fixedly displays the load when a certain load continues for a predetermined time.
A commercially available digital scale of the above-mentioned rod-like body and palm size is equipped with a control device that fixedly displays the load when a certain load continues for a predetermined time. Since it may be difficult to see the display of a digital bow balance with a finger while fully pulling the bow until it is fully filled, the state where the bow is fully pulled until it is fully filled The function that the string tension is fixedly displayed for a predetermined time is convenient.
In a preferred embodiment of the present invention, the narrow groove is formed so as to be inclined with respect to the longitudinal axis of the rod-shaped body.
In order to accurately measure the tension of the string, the interference portion between the digital bow balance and the string needs to be limited to the narrow groove of the pressure receiving portion. If a narrow groove is formed inclined with respect to the longitudinal axis of the rod-shaped body, engaging the string with the narrow groove and placing a finger on the digital bow balance will cause the digital bow balance to cross the string. In addition, it is possible to limit the interference portion between the digital bow balance and the string to the narrow groove while ensuring the ease of placing the finger.
In a preferred embodiment of the present invention, a step in the groove longitudinal direction is formed on both sides of the groove in the vicinity of both ends in the longitudinal direction of the narrow groove, or a protrusion is formed on both sides in the vicinity of both ends in the longitudinal direction of the narrow groove.
When the bow is drawn, the string may move laterally in the width direction of the narrow groove and be detached from the narrow groove. The width of the narrow groove can be obtained by forming a step in the groove longitudinal direction on both sides of the groove in the vicinity of both ends in the longitudinal direction of the narrow groove, or by forming protrusions on both sides in the vicinity of both ends in the longitudinal direction of the narrow groove. The string horizontally moved in the direction is hooked on the step or the projection, and the lateral movement of the string is restricted, and the separation from the narrow groove is prevented.
In a preferred aspect of the present invention, a finger hook portion for hooking four fingers from the index finger to the little finger is formed by a recess formed on the surface opposite to the surface on which the pressure receiving portion is disposed.
By placing four fingers from the index finger to the little finger on the finger rest, the bow can be pulled stably.
In a preferred aspect of the present invention, a handle that forms a hole through which at least one of the middle finger, ring finger, and little finger of a person is inserted is disposed on the surface opposite to the surface on which the pressure receiving portion is disposed. Yes.
If at least one of the middle finger, ring finger, or little finger is inserted into the hole formed by the handle, the digital bow scale will fall away from the hand when the hand is released from the string after measuring the string tension. Can be prevented.

1 is an external perspective view of a digital bow balance according to an embodiment of the present invention. 1 is an external perspective view of a digital bow balance according to an embodiment of the present invention when used. It is an external appearance perspective view except a hand at the time of use of the digital bow balance concerning the example of the present invention.

As shown in FIGS. 1 to 3, the digital bow balance 1 according to the present embodiment includes a strain gauge, a timer, a control IC, a battery, and the like (not shown), and a pressure receiving unit 2, a digital display unit 3, and a power switch on the upper surface. 4 is provided with a palm-sized digital scale 5. The digital scale 5 is a commercial product except for the pressure receiving part 2. The pressure receiving part (not shown) of the commercially available digital balance 5 has the same outer shape as the pressure receiving part 2 and has a wide concave portion on the surface for engaging a handle of a travel bag or a string that binds luggage. . The commercially available digital scale 5 has the power switch 4 turned ON, the handle of the travel bag or the string tied to the luggage is engaged with the wide recess of the pressure receiving part, and both ends in the longitudinal direction of the digital scale 5 are supported with both hands. It is configured to lift and maintain the lifted state for a predetermined time, and to display the weight of the travel bag or luggage on the digital display unit 3 in a fixed manner.
The digital bow balance 1 is a digital bow balance configured by replacing the pressure receiving portion of the above-described commercially available digital balance 5 with a pressure receiving portion 2 in which a narrow groove 6 through which a bow string passes is formed.
A narrow groove 6 is formed to be inclined with respect to the longitudinal axis X of the digital bow balance 1 which is a rod-shaped body.
As shown in detail in FIG. 1, a step 7 in the groove longitudinal direction is formed on the groove bank on both sides of the narrow groove 6 in the vicinity of both ends in the longitudinal direction.
A finger hooking member 8 having a thin central portion in the longitudinal direction and a thick thickness at both ends is fixed to the surface of the digital scale 5 opposite to the surface on which the pressure receiving portion 2 is disposed. The concave portion formed by the thin portion of the finger hanging member 8 forms a finger hanging portion 9 for hanging four fingers from the index finger to the little finger when the bow is drawn.
A handle 10 that forms a hole 10 a through which the user's middle finger, ring finger, and little finger are inserted is fixed to the finger hook 9.

The operation of the digital bow balance 1 will be described.
As shown in FIG. 2, with the hand 200 having the bow string 100, four fingers from the index finger to the little finger are hung on the finger hanging part 9 of the digital bow balance 1, and the string 100 is engaged with the narrow groove 6 on the surface of the pressure receiving part 2. Combine. When a bow (not shown) is fully drawn to a full state and maintained in this state for a predetermined time, the tension of the string 100 is precisely the component force in the direction of the arrow Y perpendicular to the bow (not shown) of the tension of the string 100. Fixed display on the digital display unit 3. If the digital bow balance 1 is used, the tension | tensile_strength of the string 100 can be easily measured in arbitrary places. In addition, the digital bow balance 1 can measure the tension of the string while actually reproducing the action of pulling the bow, so that the change in the tension of the string in the process of pulling the bow, that is, the advantage that the characteristics of the bow can be easily measured. Have.
In order to accurately measure the tension of the string 100, the interference part between the digital bow balance 1 and the string 100 needs to be limited to the narrow groove 6 of the pressure receiving part 2. Since the narrow groove 6 is formed to be inclined with respect to the longitudinal axis X of the digital bow balance 1 that is a rod-shaped body, when the string 100 is engaged with the narrow groove 6 and a finger is placed on the digital bow balance 1, The bow balance 1 is oblique to the string 100. Thereby, the interference part of the digital bow balance 1 and the string 100 can be limited to the narrow groove 6 while ensuring ease of finger placement.
When the bow is drawn, the string 100 may move laterally in the width direction of the narrow groove 6 and leave the narrow groove 6. Since the step 7 in the groove longitudinal direction is formed on both sides of the groove in the vicinity of both ends in the longitudinal direction of the narrow groove 6, the string 100 moved laterally in the width direction of the narrow groove 6 is applied to the step 7, and the string 100 is moved laterally. Is restricted, and the separation of the string 100 from the narrow groove 6 is prevented.
By hanging four fingers from the index finger to the little finger on the finger hook portion 9 formed by the finger hook member 8, the bow can be pulled stably.
The middle finger, the ring finger, and the little finger are placed in the hole 10a formed by the handle 10 fixed to the surface opposite to the surface on which the pressure receiving portion 2 is disposed, more specifically, the finger hanging portion 9 formed by the finger hanging member 8. If inserted, when the hand is released from the string 100 after measuring the tension of the string 100, the digital bow balance 1 can be prevented from falling off the hand.

The digital bow balance 1 may include a control device that displays the load every moment instead of the control device that fixedly displays the load when a certain load continues for a predetermined time. In this case, while maintaining the state where the bow is fully drawn to the full state, the tension of the digitally displayed string can be visually observed while feeling some difficulty, or the other person can visually observe the tension. good.
Instead of forming the step 7 in the longitudinal direction of the groove in the groove bank on both sides in the vicinity of both ends in the longitudinal direction of the narrow groove 6, protrusions may be formed on both sides in the vicinity of both ends in the longitudinal direction of the narrow groove. The string 100 that has moved laterally in the width direction of the narrow groove 6 is hooked on the projection, and the lateral movement of the string 100 is restricted, and the string 100 is prevented from being detached from the narrow groove 6.
The hole 10a formed by the handle 10 may be a hole through which one or two of the middle finger, ring finger, and little finger can be inserted.

The present invention can be widely used for bow balances.

DESCRIPTION OF SYMBOLS 1 Digital bow balance 2 Pressure receiving part 3 Digital display part 4 Power switch 5 Digital balance 6 Narrow groove 7 Level difference 8 Finger hanging member 9 Finger hanging part 10 Handle 10a Hole 100 String 200 Hand

Claims (6)

A palm-sized digital arch scale with a rod-like body in which a narrow groove is formed on the surface of the pressure-receiving portion to pass a bow string. The digital bow balance according to claim 1, further comprising a control device that fixedly displays the load when a certain load continues for a predetermined time. 3. The digital bow balance according to claim 1, wherein a narrow groove is formed so as to be inclined with respect to the longitudinal axis of the rod-shaped body. 2. A groove step in the groove longitudinal direction is formed on both sides of the groove in the vicinity of both ends in the longitudinal direction of the narrow groove, or a protrusion is formed on both sides in the vicinity of both ends in the longitudinal direction of the narrow groove. 4. The digital bow balance according to any one of 3 above. 5. The finger hooking portion for hooking four fingers from the index finger to the little finger is formed by a concave portion formed on a surface opposite to the surface on which the pressure receiving portion is disposed. The digital bow balance according to any one of the above. The handle that forms a hole through which at least one of the middle finger, ring finger, and little finger of a person is inserted is disposed on a surface opposite to the surface on which the pressure receiving portion is disposed. The digital bow balance according to any one of 1 to 5.

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