Scissors

Abstract

To reduce the amount of chemical liquid used.SOLUTION: Scissors (1) comprise: a first blade (11) and a second blade (12), which are rotatably joined about a fulcrum (13); a storage part (30), which stores a chemical liquid (33) and includes an operation part (32) and a discharge port (34); a cam (40), which is mounted on the second blade and moves rotationally in accordance with the blade opening and closing action; and a contact element (323), which is disposed in contact with the cam, is pressed by the rotationally moving cam, and moves in a direction to press the operation part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to scissors. [Background technology]

[0002] The following Patent Document 1 discloses gardening scissors that are equipped with a chemical container and disinfect the scissors at the same time as cutting, thereby preventing infection with pathogens such as bacteria and viruses that are transmitted through tree sap during tasks such as pruning. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3144790 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-mentioned conventional technology, when a user tilts the liquid medicine container attached to the scissors while working, the liquid medicine in the liquid medicine container flows out along the liquid medicine passage formed inside the handle of the scissors and is applied to the cutting blade. Therefore, it is not possible to adjust the amount of liquid medicine applied, and there are problems such as using more liquid than necessary, and foreign matter entering the liquid medicine passage and clogging it, making it impossible to apply the liquid medicine.

[0005] An object of one aspect of the present invention is to provide scissors that reduce the amount of chemical solution used and that can reliably apply chemical solution every time the scissors are opened and closed. [Means for solving the problem]

[0006] In order to solve the above problems, a pair of scissors according to one embodiment of the present invention comprises a first blade and a second blade rotatably connected about a fulcrum, a storage section for storing a medicinal solution and including an operating section and an outlet through which the operating section is pressed to discharge the medicinal solution, a cam attached to the second blade and which moves and rotates about the fulcrum as the first blade and the second blade open and close, and a contact connected to the operating section and positioned in contact with the cam, and which is pressed by the rotating and moving cam to move in a direction pressing the operating section. Effect of the Invention

[0007] According to one aspect of the present invention, it is possible to provide scissors that reduce the amount of chemical solution used and that can reliably apply chemical solution every time the scissors are opened and closed. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of the appearance of scissors according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a partially enlarged view of the scissors shown in FIG. [Diagram 3] FIG. 2 is a schematic diagram illustrating the state of the storage container shown in FIG. [Figure 4] FIG. 2 is a schematic diagram showing the mounting member shown in FIG. [Diagram 5] 2 is a schematic diagram illustrating the operation of the plate cam shown in FIG. 1. [Figure 6] FIG. 2 is a schematic diagram showing an example of a scissors blade. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Embodiment 1] Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. In the following, the scissors 1 according to the present invention will be described based on an example in which the scissors are used to cut plants. Here, the scissors used to cut plants refer to, for example, scissors used to harvest flowers, fruits, vegetables, etc., scissors used to prune leaves, branches, etc., and scissors used to cut roots, etc. However, the present invention is not limited to these, and may be applied to any scissors whose blades may be contaminated with liquid containing pathogens, etc. during use, and may also be applied to, for example, medical scissors, etc.

[0010] For example, if you cut a plant infected with canker with scissors and then use the same scissors to cut another healthy plant, the pathogen will enter the cut surface through the scissors blades and infect the healthy plant with canker. In order to prevent the spread of disease through the scissors blades, it is necessary to disinfect the scissors blades while cutting the plant.

[0011] The scissors 1 according to the present invention can easily perform cutting and disinfection of the scissors blades in parallel.

[0012] <Configuration of scissors 1> In this embodiment, an example of scissors used for cutting plants will be described in detail. Note that the lengths, angles, etc. described below are merely examples and do not limit the present invention, and can be changed as appropriate. Figure 1 is a diagram showing an example of the appearance of scissors 1 according to an embodiment of the present invention, and Figure 2 is a partial enlarged view of scissors 1.

[0013] As shown in FIGS. 1 and 2, scissors 1 are configured to include a pair of blades 10, a connecting portion 13 (fulcrum), a pair of gripping portions 20, a plate cam 40 (cam), a storage portion 30, and an attachment member 50.

[0014] The pair of blades 10 includes a first blade 11 and a second blade 12 that are rotatably connected to each other around a connecting portion 13, which will be described later.

[0015] In the following description, when the first blade 11, the second blade 12, etc. are not distinguished from one another and are referred to collectively, they will be referred to as blade 10. Similarly, when the first gripping portion 21, the second gripping portion 22, etc. are not distinguished from one another and are referred to collectively, they will be referred to as gripping portion 20, which will be described later.

[0016] The pair of gripping parts 20 has a first gripping part 21 provided in connection with the first blade 11, and a second gripping part 22 provided in connection with the second blade 12. A user can close the first blade 11 and the second blade 12 by grasping the first gripping part 21 and the second gripping part 22 and rotating the first gripping part 21 and the second gripping part 22 in a direction in which they approach each other. This allows the user to cut a plant located between the first blade 11 and the second blade 12.

[0017] The first grip portion 21 and the second grip portion 22 are biased in directions away from each other by the spring 14. Therefore, when the user loosens the grip on the grip portion 20, the first blade 11 and the second blade 12 can be opened.

[0018] The connecting portion 13 is realized as a screw 131 or the like that rotatably connects the first blade 11 and the second blade 12. In other words, the connecting portion 13 is a fulcrum of rotation when the first blade 11 and the second blade 12 rotate. The connecting portion 13 is also a center of rotation when the plate cam 40 attached to the first blade 11 rotates.

[0019] The storage section 30 includes a storage container 31 that stores a medicinal liquid 33, an operation section 32, a discharge port 34, a tube 35, and a flow path 36.

[0020] The container 31 is formed in a substantially cylindrical shape, and has a storage space 311 formed therein for storing the chemical solution 33. The chemical solution 33 may be any chemical solution capable of disinfecting the blades 10 of the scissors 1, and examples of the chemical solution include ethanol, calcium hypochlorite (Chemicron G: registered trademark of Chemimicron), streptomycin hydrate, and the like.

[0021] The operating unit 32 includes an operating unit body 321, a roller 322, a contact 323, and a spring 324. When the operating unit 32 is pressed in the axial direction of the storage container 31, the medicinal solution 33 in the storage space 311 passes through the flow path 36 and the tube 35, and is discharged from the discharge port 34 to the first blade 11.

[0022] The contact 323 is rotatably connected to the operation unit main body 321. The contact 323 constitutes the cam mechanism of the plate cam 40, and the operation unit main body 321 functions as a follower of the cam mechanism. The contact 323 has a roller 322 attached to its outer circumferential surface so that it can slide smoothly along the cam surface 41 of the plate cam 40, which will be described later. The roller 322 is disposed so as to come into contact with the cam surface 41.

[0023] The flow path 36 is a flow path for the drug solution 33 formed inside the storage unit 30, and connects the storage container 31 and the tube 35. The flow path 36 has one end 36a connected to the storage container 31 and the other end 36b connected to the tube 35.

[0024] The tube 35 is made of a flexible material, and connects the flow path 36 and the discharge port 34. The tube 35 has a base end 35b connected to the other end 36b of the flow path 36, and a free end 35a to which the discharge port 34 is attached.

[0025] Discharge outlet 34 is fixed to the vicinity of base end 11c of first blade 11 by fixing portion 341, and discharges medical solution 33 to base end 11c. Fixed portion 341 is, for example, a band-shaped member extending from first gripping portion 21 to base end 11c of first blade 11. This allows discharge outlet 34 to discharge medical solution 33 toward base end 11c of first blade 11. The shape of fixed portion 341 is not limited thereto as long as it can fix discharge outlet 34 to the vicinity of base end 11c.

[0026] Here, the storage unit 30 of this embodiment will be described in more detail with reference to Fig. 3. The storage unit 30 is configured as a vacuum pump that can smoothly discharge the chemical solution 33 regardless of the orientation of the storage container 31.

[0027] Fig. 3 is a schematic diagram for explaining the state of the storage container 31. Reference symbol 3A in Fig. 3 shows a state in which the storage container 31 is almost filled with the medicinal liquid 33, and reference symbol 3B shows a state in which a small amount of the medicinal liquid 33 remains in the storage container 31.

[0028] As indicated by reference symbols 3A and 3B, a piston 312 that divides the storage space 311 into a liquid medicine storage section 311a that stores the liquid medicine 33 and a gap 311b is disposed in the storage space 311. The piston 312 is formed in a disk shape and is slidable in the axial direction of the storage container 31. The liquid medicine storage section 311a is maintained in a vacuum state.

[0029] As shown by the reference symbol 3B, the piston 312 slides in the storage space 311 while maintaining a vacuum state in the liquid medicine storage section 311a, and when the remaining amount of the liquid medicine 33 decreases, the piston 312 pushes the liquid medicine 33 up toward the flow path 36. This allows the liquid medicine 33 to be supplied to the flow path 36 regardless of the orientation of the storage container 31. Therefore, unlike a pump or the like that sucks up the liquid medicine from the bottom of the storage container with a suction nozzle or the like, the liquid medicine 33 can be smoothly discharged even when the remaining amount of the liquid medicine 33 is small or the storage container 31 is facing downward. Therefore, even when the scissors 1 are tilted upward or downward to cut a plant when using the scissors 1, the blades 10 of the scissors 1 can be disinfected without any problems.

[0030] Here, explanation will be given again with reference to Fig. 1. Plate cam 40 is attached to second blade 12, and rotates about connecting portion 13 in accordance with the opening and closing operations of first blade 11 and second blade 12. Plate cam 40 is fixed to second blade 12 by a bolt, but is not limited to this, and may be attached to the second blade by welding, for example, or may be configured integrally with the second blade.

[0031] Although details will be described later, a curved cam surface 41 with a variable diameter is formed on plate cam 40, and roller 322 is disposed so as to come into contact with cam surface 41. Roller 322 moves in a direction pressing operation unit 32 in conjunction with the rotational movement of plate cam 40. As a result, operation unit body 321 connected to roller 322 is pressed, and medicinal liquid 33 contained in storage unit 30 is discharged.

[0032] Fig. 4 is a schematic diagram showing the mounting member. The mounting member 50 is a member for mounting the storage portion 30, and is attached to the first gripping portion 21 that connects with the first blade on the opposite side to the second blade 12 that mounts the plate cam 40. As shown in Fig. 4, the mounting member 50 includes a storage container fixing portion 51, a guide portion 52, and a mounting bolt (not shown).

[0033] The storage container fixing part 51 has an insertion hole 511 through which one end of the storage container 31 is inserted. One end of the storage container 31 is inserted into the insertion hole 511 and fixed to the first grip part 21 connected to the first blade 11 via the storage container fixing part 51 by a bolt 512. The storage container fixing part 51 has a clamp function so as to be able to hold the position of the storage container 31 against the pressing force applied to the operation unit main body 321 functioning as a follower.

[0034] One or more guide parts 52 are provided, each having an insertion hole 521 through which the operation part body 321 is inserted. The guide part 52 slidably guides the operation part body 321, which is pressed via a contact 323 by the rotational movement of the plate cam 40.

[0035] The mounting member 50 is fixed to the first gripping portion 21 that is connected to the first blade by a mounting bolt. However, the mounting member 50 may be configured to slide and fit into an engagement portion formed on the first gripping portion 21. The mounting member 50 may be detachably attached to the first gripping portion 21, or may be configured integrally with the first gripping portion 21.

[0036] In this way, the storage unit 30 can be attached compactly to the scissors 1 itself via the attachment member 50. This makes it possible to work more easily and improve work efficiency, since there is no need to separately provide a disinfection device, a power source, etc. and connect them with a cord, etc.

[0037] <Plate cam mechanism> Fig. 4 is a schematic diagram illustrating the operation of the plate cam 40. As shown in Fig. 4, the plate cam 40 is attached to the second blade 12, and rotates in the X1 direction or the X2 direction with the center of the connecting part 13 as the rotation center C1 in conjunction with the opening and closing operations of the first blade 11 and the second blade 12. The plate cam 40 rotates in the X1 direction when the blade 10 closes, and rotates in the X2 direction when the blade 10 opens.

[0038] Plate cam 40 is formed with curved cam surface 41 whose diameter changes midway. Roller 322 and contactor 323 are arranged on cam surface 41 so as to come into contact with cam surface 41. Roller 322 is pressed by plate cam 40 which rotates and moves in a direction pressing operating unit 32. This presses operating unit 32, causing medicinal liquid 33 contained in storage unit 30 to be discharged.

[0039] (Displacement) 4 indicate positions on the cam surface 41. The cam surface 41 is formed with a first cam surface 411, a second cam surface 412, and a third cam surface 413. When closing the blade 10, the plate cam 40 rotates in the X1 direction, causing the roller 322 to slide over the first cam surface 411, the second cam surface 412, and the third cam surface 413 in this order. On the other hand, when opening the blade 10, the plate cam 40 rotates in the X2 direction, causing the roller 322 to slide over the third cam surface 413, the second cam surface 412, and the first cam surface 411 in this order.

[0040] First cam surface 411 is the outer peripheral surface of a circle of radius R1 centered at C1, and is the portion from P0 to P1. Radius R1 is the minimum length from C1 on cam surface 41, and this length is, for example, about 20 mm.

[0041] Third cam surface 413 is the outer peripheral surface of a circle having a radius R2 centered at C1, and is the portion from P2 to P3. The length of radius R2 from C1 is maximum, and this length is, for example, about 22.5 mm.

[0042] The first cam surface 411 and the third cam surface 413 are portions whose radius does not change, and do not act on the roller 322 even when the plate cam 40 rotates.

[0043] The second cam surface 412 is the portion from P1 to P2, where the rotation of the plate cam 40 acts on the roller 322. When the blade 10 is closed, it rises smoothly from P1, which is the starting point of the cam action, and smoothly connects to the third cam surface 413 at P2. In this second cam surface 412, the radius changes from R1 to R2, and the amount of displacement L is about 2.5 mm (=R2-R1). Therefore, the roller 322 linearly displaces in the direction Y1 in which it presses the operation unit main body 321, by the amount of displacement L of about 2.5 mm, between P1 and P2.

[0044] When closing the blade 10, the roller 322 moves by a displacement amount L in a direction Y1 in which the operation unit body 321 is pressed in conjunction with the rotational movement of the plate cam 40, and discharges the chemical solution 33 from the discharge port 34. When opening the blade 10, the roller 322 moves by a displacement amount L in a direction Y2 opposite to the pressing direction. At this time, the chemical solution 33 is sucked from the storage container 31 into the vacuum pump 37 and temporarily stored in preparation for the next discharge.

[0045] The amount by which operation unit body 321 is pressed, and the associated amount of medicinal liquid 33 discharged, can be adjusted to an optimum amount by adjusting the amount of displacement L of the radius of plate cam 40. Increasing the amount of displacement L allows operation unit body 321 to be pressed more strongly, and the amount of medicinal liquid 33 to be discharged to be increased. Conversely, decreasing the amount of displacement L allows operation unit body 321 to be pressed less strongly, and the amount of medicinal liquid 33 to be discharged to be reduced.

[0046] When pressing the operation unit body 321 with a finger, the pressing force and direction cannot be constant, so excessive load is applied to the operation unit body 321 and the storage container 31. On the other hand, the scissors 1 can set the pressing amount to a minimum and constant by setting the displacement amount L of the plate cam 40, so that the durability of the pump can be improved. In this embodiment, the pressing amount of the operation unit body 321 is set to about 2.5 mm (=displacement amount L).

[0047] Furthermore, by setting the displacement amount L of the plate cam 40, the discharge amount of the chemical solution 33 can be controlled to a minimum and constant, thereby reducing the amount of the chemical solution 33 used. In this embodiment, the discharge amount of the chemical solution 33 is the minimum amount that can obtain the disinfecting effect, and can be set to approximately 0.05 ml or less to prevent unnecessary consumption of the chemical solution.

[0048] (Area of ​​action) The angle between P1 and P2 with C1 as the center is about 20°. Therefore, the range of action D1 of the plate cam 40 is about 20°, and in this range of action D1, the roller 322 moves in the direction Y1 in which it presses the operating part 32 or in the direction Y2 opposite to the pressing direction due to the action of the plate cam 40.

[0049] On the other hand, the angle when the first blade 11 and the second blade 12 are opened is about 25°, and the roller 322 is at the position P1 when the blade 10 is fully opened. When closing the blade 10, the plate cam 40 acts on the roller 322 in the action range D1 to discharge the chemical solution 33. After that, for about 5°, the discharge is completed, during which the plant is cut and the blade 10 is closed. As a result, the chemical solution 33 is discharged until just before the plant is cut, and the blade 10 can be effectively disinfected.

[0050] The timing of ejection of this chemical solution 33 can be controlled to an optimum timing according to the application of the scissors 1 by setting the operating range D1 of the plate cam 40.

[0051] <Modification> Fig. 6 is a schematic diagram showing an example of the first blade 11 of the scissors 1. As described above, the discharge port 34 discharges the medicinal solution 33 toward the base end 11c of the first blade 11. As shown in Fig. 6, the first blade 11 may have a groove 11d formed from the base end 11c toward the cutting edge. The groove 11d is formed to have a width of 1.0 mm, a depth of 0.5 mm, and a length of 20.0 to 30.0 mm, for example.

[0052] The groove 11d is formed to promote retention of the discharged chemical solution 33 on the blade surface, thereby improving the disinfection effect. In addition, the groove 11d guides the chemical solution 33 discharged to the base end 11c toward the blade tip side, so that the chemical solution 33 can be applied to the entire first blade 11. In addition, when the blade 10 is closed, the chemical solution 33 can also be applied to the entire second blade 12 that abuts against the first blade 11.

[0053] First blade 11 may have a plurality of depressions formed therein in place of groove 11d for temporarily storing chemical solution 33.

[0054] In this embodiment, the outlet 34 is structured to eject the medicinal liquid 33 in a rod-like form, but it may be outlet 34a that sprays the medicinal liquid 33 in a spray form depending on the application of the scissors 1. Also, depending on the application of the scissors 1, the scissors 1 may be structured so that the outlet 34 and the outlet 34a are interchangeable.

[0055] In this embodiment, the storage unit 30 is a vacuum pump, but if the direction in which the chemical solution 33 needs to be sprayed is only upward, a normal pump that sucks up the chemical solution from the bottom of the storage container using a suction nozzle or the like may be used instead of a vacuum bottle.

[0056] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

[0057] <Summary> The scissors according to aspect 1 of the present invention comprise a first blade and a second blade rotatably connected about a fulcrum, a storage section for storing a medicinal solution and including an operating section and an outlet through which the operating section is pressed to discharge the medicinal solution, a cam attached to the second blade and which moves and rotates about the fulcrum as the first blade and the second blade open and close, and a contact connected to the operating section and positioned in contact with the cam, and which is pressed by the rotating and moving cam to move in a direction pressing the operating section.

[0058] A second aspect of the present invention relates to the scissors of the first aspect, wherein the contacts move in a direction opposite to the pressing direction as the first blade and the second blade open.

[0059] A third aspect of the present invention relates to the scissors of the first or second aspect, wherein the storage portion is held by a mounting fixture to the grip portion of the first blade.

[0060] A fourth aspect of the present invention relates to the scissors of the third aspect, wherein the attachment may include a guide portion for guiding the movement of the contacts.

[0061] In the scissors according to aspect 5 of the present invention, in any one of aspects 1 to 4 above, the cam is a plate cam, and the amount of pressure applied to the operating portion, the amount of medicinal liquid ejected, and the timing of ejection may be controlled by the amount of radial displacement and area of ​​action of the plate cam.

[0062] A sixth aspect of the present invention relates to the scissors of any one of the first to fifth aspects, wherein the discharge port discharges the liquid medicine toward the first blade.

[0063] A seventh aspect of the present invention relates to the scissors of any one of the first to sixth aspects, wherein the first blade has a groove or depression formed therein for guiding the chemical solution toward the blade tip.

[0064] In accordance with an eighth aspect of the present invention, in the scissors of any one of the first to seventh aspects, the housing portion may be a vacuum pump.

[0065] The scissors according to a ninth aspect of the present invention may be the scissors used to cut plants in any of the first to eighth aspects above. [Explanation of symbols]

[0066] 1. Scissors 11 The First Blade 11d groove 12 The Second Blade 13 Connection (fulcrum) 21 First gripping portion 30 Storage unit 32 Operation section 34 Discharge port 40 Plate Cam (Cam) 50 Mounting parts (mounting fixtures) 52 Guide part 323 Contact

Claims

1. a first blade and a second blade rotatably connected about a fulcrum; a storage part that stores a chemical solution, an operation part, and a discharge port that discharges the chemical solution when the operation part is pressed; a cam attached to the second blade and rotating about the fulcrum along with the opening and closing operations of the first blade and the second blade; a pair of scissors comprising a contact element connected to the operation part, arranged in contact with the cam, and moved in a direction to press the operation part when pressed by the rotating cam.

2. The contact element according to claim 1, wherein the contact element moves in a direction to press the operation part along with the closing operation of the first blade and the second blade, and moves in a direction opposite to the pressing direction along with the opening operation.

3. The pair of scissors according to claim 1 or 2, wherein the storage part is held by a gripping part of the first blade by a fixture.

4. The pair of scissors according to claim 3, wherein the fixture includes a guide part for guiding the movement of the contact element.

5. The cam is a plate cam, and the amount of displacement and the working range of the diameter of the plate cam control the amount by which the operation part is pressed, the discharge amount of the chemical solution, and the timing of discharge according to claim 1 or 2.

6. The pair of scissors according to claim 1 or 2, wherein the discharge port discharges the chemical solution toward the first blade.

7. The pair of scissors according to claim 6, wherein a groove or a depression for guiding the chemical solution toward the blade tip is formed in the first blade.

8. The pair of scissors according to claim 1 or 2, wherein the storage part is a vacuum pump.

9. The pair of scissors according to claim 1 or 2, which is used when cutting plants.

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