TWI911112B - Scissors - Google Patents

Abstract

A scissors includes a first blade body, a second blade body and a locking component. The first blade body includes a first handle, and the first handle has a first engaging portion. The second blade body is pivotally connected to the first blade body and includes a second handle. The second handle has a pushing portion. The locking component is slidably disposed on the first handle and includes a main body and an elastic movable portion. The elastic movable portion is connected to the main body and has a second engaging portion. The second engaging portion is adapted to engage with the first engaging portion. When the second handle approaches the first handle and the locking component slides, the elastic movable portion is adapted to be push and deformed by the pushing portion, and drives the second engaging portion to disengage from the first engaging portion, so that the locking component can lock the second handle.

Description

Scissors

This invention relates to a pair of scissors, and more particularly to a pair of scissors with a safety locking function.

To prevent scissors from accidentally opening when not in use and causing danger, some scissors have a safety lock function. Specifically, one of the handles of the scissors has a sliding safety catch. When the two handles are close together, the user can slide the safety catch on one handle to the locked position to lock the other handle, thus preventing the scissors from opening. However, when the scissors are not open, the safety catch can still slide freely. If the user accidentally slides the safety catch to the locked position while operating the scissors, the safety catch will prevent the two handles from getting close together, making the scissors unable to be used normally.

This invention provides a pair of scissors that avoids the locking element affecting the normal operation of the scissors and can be easily locked by the locking element.

The scissors of this invention include a first blade body, a second blade body, and a locking member. The first blade body includes a first handle with a first engaging portion. The second blade body is hinged to the first blade body and includes a second handle with a pushing portion and a first locking portion. The locking member is slidably disposed on the first handle and includes a main body and a flexible movable portion. The main body has a second locking portion, and the flexible movable portion is connected to the main body and has a second engaging portion. The second engaging portion is adapted to engage with the first engaging portion. When the second handle approaches the first handle and the locking member slides, the flexible movable portion is adapted to be pushed and deformed by the pushing portion, thereby causing the second engaging portion to disengage from the first engaging portion, so that the second locking portion can lock the first locking portion.

In one embodiment of the invention, the locking member is adapted to slide between a released position and a locked position when the first grip moves close to the first grip and the locking member slides from the released position toward the locked position, the elastic movable part moves toward the pushing part and is pushed and deformed by the pushing part.

In one embodiment of the present invention, the main body has a slot, and the elastic movable part is disposed in the slot.

In one embodiment of the present invention, the aforementioned elastic movable part includes a rotating part and two fulcrum parts. The opposite sides of the rotating part are respectively connected to the main body through the two fulcrum parts, so that the rotating part can rotate along a rotation axis passing through the two fulcrum parts by means of the elastic deformation of the two fulcrum parts.

In one embodiment of the present invention, the rotating part has a first end and a second end located on opposite sides of the axis of rotation, the distance between the first end and the axis of rotation is greater than the distance between the second end and the axis of rotation, and the second engaging part is located at the first end.

In one embodiment of the present invention, the second engaging portion includes a spring arm adapted to abut against the first engaging portion.

In one embodiment of the present invention, the aforementioned elastic movable part has a protrusion. When the locking member slides and brings the protrusion close to the pushing part, the protrusion is pushed by the pushing part and then passes over the pushing part.

In one embodiment of the present invention, at least one of the aforementioned push portion and protrusion has a guiding ramp, such that when the locking member slides to bring the protrusion closer to the push portion, the protrusion is adapted to pass over the push portion by being guided by the guiding ramp.

In one embodiment of the present invention, the pushing part has a first bearing slope and the protrusion has a second bearing slope. After the protrusion passes the pushing part, the second bearing slope rests against the first bearing slope.

In one embodiment of the present invention, the second grip has a groove, the width of a first section of the groove being greater than the width of a second section of the groove, the groove forming a first locking portion in the second section. When the second grip approaches the first grip and the second engaging portion engages with the first engaging portion, the second locking portion is located within the first section. When the second grip approaches the first grip and the second locking portion locks the first locking portion, the second locking portion is located within the second section.

Based on the above, in the scissors of the present invention, the first handle is provided with a first engaging portion and the locking member is provided with a second engaging portion. When the scissors are in use, the locking member can be engaged with the first engaging portion by its second engaging portion, so as to prevent the user from accidentally touching the locking member and causing the locking member to slide to the locked position during the operation of the scissors. Furthermore, the second engaging portion is provided in the elastic movable portion of the locking member and the second handle is provided with a pushing portion. Therefore, when the user wishes to lock the scissors using the locking mechanism while the first and second handles are close together, the locking mechanism can be slid from its position near the first engaging part towards the first locking part. This causes the elastic movable part to move towards the pushing part of the second handle and be pushed by the pushing part, resulting in elastic deformation of the elastic movable part. This causes the second engaging part to disengage from the first engaging part, thus smoothly sliding the locking mechanism to the locked position. This prevents the locking mechanism from interfering with the normal operation of the scissors and allows for convenient locking of the scissors.

Figure 1 is a perspective view of scissors according to an embodiment of the present invention. Figure 2 is an exploded view of the scissors of Figure 1. Figure 3 is a perspective view of a partial structure of the scissors of Figure 1, the cross-section of which corresponds to line A-A in Figure 1. Referring to Figures 1 to 3, the scissors 100 of this embodiment includes a first blade body 110, a second blade body 120, and a locking element 130. The first blade body 110 includes a first handle 112. The second blade body 120 is hinged to the first blade body 110 along the hinge axis A1 and includes a second handle 122. The locking element 130, also known as a safety latch, is slidably mounted on the first handle 112.

Figure 4A illustrates the two handles of Figure 1 brought close together to close the scissors. Figure 4B illustrates the locking element of Figure 4A locking the scissors. The locking element 130 is adapted to slide the first handle 112 between a release position shown in Figure 4A and a locked position shown in Figure 4B. When the scissors 100 are closed, the user can slide the locking element 130 from the release position to the locked position, thereby locking the first handle 112 and the second handle 122 so that they cannot be separated, thus preventing the scissors 100 from opening.

Figure 5A is a cross-sectional view of the scissors in Figure 4A along line G-G. Figure 5B is a cross-sectional view of the scissors in Figure 4B along line H-H. Figure 6 is a perspective view of the locking member in Figure 1. Referring to Figures 1, 5A, 5B and 6, in detail, the second grip 122 has a groove 122a, the first grip 112 has a groove 112a, and the locking member 130 has a second locking part 1321 (hook) and a latch 1322. The latch 1322 of the locking member 130 is slidably disposed in the groove 112a of the first grip 112, so that the locking member 130 is slidably disposed on the first grip 112. Furthermore, when the first grip 112 and the second grip 122 approach each other as shown in FIG4A, the second locking part 1321 (hook) of the locking member 130 enters the groove 122a of the second grip 122 and can slide along the groove 122a.

The width W1 (indicated in FIG. 5A) of a first section S1 of groove 122a is greater than the width W2 (indicated in FIG. 5B) of a second section S2 of groove 122a. An inner wall of the second section S2 of groove 122a forms a first locking portion 1221 of the second grip 122. When the second grip 122 is close to the first grip 112 and the second engaging portion 134a engages with the first engaging portion 1121 (i.e., when the locking member 130 is in the released position as shown in FIG. 4A and FIG. 5A), the second locking portion 1321 (hook) of the locking member 130 is located within the first section S1 and away from the first locking portion 1221 (inner wall of the second section S2) of the second grip 122, at which time the locking member 130 is not locked. When the second grip 122 approaches the first grip 112 and the second locking part 1321 locks the first locking part 1221 (that is, when the locking member 130 is in the locked position as shown in Figures 4B and 5B), the second locking part 1321 (hook) of the locking member 130 is located in the second section S2 and blocks the first locking part 1221 (inner wall of the second section S2) of the second grip 122, thereby restricting the second grip 122 from moving away from the first grip 112, thus achieving the locking effect.

Referring to Figure 2, the first grip 112 has a first engaging portion 1121, and the second grip 122 has a pushing portion 1222. The locking member 130, as shown in Figure 6, includes a main body 132 and a flexible movable portion 134. The second locking portion 1321 and the latch 1322 are formed on the main body 132, and the flexible movable portion 134 is connected to the main body 132 and has a second engaging portion 134a.

Figure 7 is a perspective view of a partial structure of the scissors of Figure 1. Figures 8A, 8B, 9A, and 9B illustrate that the locking member of Figure 7 is restricted from sliding to the locked position, wherein the cross-sections of Figures 8A and 8B correspond to line B-B in Figure 7, and the cross-sections of Figures 9A and 9B correspond to line C-C in Figure 7. When the second grip 122 is separated from the first grip 112 and the locking member 130 is in the released position as shown in Figure 7, the second engaging portion 134a of the elastic movable portion 134 of the locking member 130 is adapted to engage with the first engaging portion 1121 of the first grip 112 as shown in Figures 8A and 9A to prevent the locking member 130 from sliding to the locked position.

As shown in FIG. 8A, the second engaging portion 134a of this embodiment includes a curved spring arm adapted to abut against the first engaging portion 1121 in the direction D1 toward the locking position. In this state, if the user accidentally touches the locking member 130 and causes the locking member 130 to move in the direction D1 toward the locking position, the spring arm will be squeezed and elastically deformed as shown in FIG. 8B and FIG. 9B, and then the locking member 130 will spring back to the state shown in FIG. 8A and FIG. 9A by its elastic restoring force.

Figure 10 is a perspective view of a partial structure of the scissors of Figure 4A. Figures 11A to 11C and 12A to 12C illustrate the locking member of Figure 10 sliding to the locked position, where the cross-sections of Figures 11A to 11C correspond to line E-E in Figure 10, and the cross-sections of Figures 12A to 12C correspond to line F-F in Figure 10. When the second grip 122 approaches the first grip 112 and the locking member 130 slides from the release position shown in Figures 10, 11A, and 12A along the direction D1 (indicated in Figures 11B and 12B) toward the locked position, the elastic movable part 134 of the locking member 130 moves toward the pushing part 1222 of the second grip 122, thereby pushing the locking member 130 with the pushing part 1222 of the second grip 122. The elastic movable part 134 deforms, thereby causing the second engaging part 134a of the elastic movable part 134 to disengage from the first engaging part 1121 of the first grip 112, so that the locking member 130 can slide to the locking position as shown in Figures 11B to 11C and Figures 12B to 12C, and lock the first locking part 1221 (the inner wall of the second section S2, shown in Figure 5B) by the second locking part 1321 (hook, shown in Figure 5B).

During operation as shown in Figures 12A to 12C, the spring arm of the second engaging portion 134a undergoes elastic deformation as shown in Figure 12B, allowing the elastic movable portion 134 to rotate smoothly, and preventing the locking member 130 from loosening due to the elastic force of the spring arm. In other embodiments, the second engaging portion 134a may not include a spring arm; instead, the second engaging portion 134a and the first engaging portion 1121 may have an appropriate gap to allow the elastic movable portion 134 to rotate smoothly.

As described above, in the scissors 100 of this embodiment, the first handle 112 is provided with a first engaging portion 1121 and the locking member 130 is provided with a second engaging portion 134a. The locking member 130 in the released position can be engaged with the first engaging portion 1121 by its second engaging portion 134a, so as to prevent the user from accidentally touching the locking member 130 and causing the locking member to slide to the locked position during the operation of the scissors 100. Furthermore, the second engaging portion 134a is provided in the elastic movable portion 134 of the locking member 130 and the second handle 122 is provided with a pushing portion 1222. Accordingly, when the user wishes to lock the scissors 100 using the locking member 130 while the first grip 112 and the second grip 122 are close to each other, the locking member 130 can be slid from the released position along the direction D1 toward the locked position. This causes the elastic movable part 134 to be pushed by the pushing part 1222, thereby causing the elastic movable part 134 to elastically deform and causing the second engaging part 134a to disengage from the first engaging part 1121, thus smoothly sliding the locking member 130 to the locked position. This prevents the locking member 130 from affecting the normal operation of the scissors 100 and allows for convenient locking of the scissors 100 using the locking member 130.

Referring to Figure 6, in this embodiment, the main body 132 of the elastic movable part 134 has a slot 132a, and the elastic movable part 134 is disposed in the slot 132a. Accordingly, the elastic movable part 134 can be located in the inner region of the locking member 130 to prevent the elastic movable part 134 from being accidentally activated and causing the second engaging part 134a to disengage from the first engaging part 1121. In detail, the elastic movable part 134 includes a rotating part 1341 and two fulcrum parts 1342. The two opposite sides of the rotating part 1341 are respectively connected to the inner wall of the slot 132a of the main body 132 by the two fulcrum parts 1342, so that the rotating part 1341 is adapted to rotate along a rotation axis A2 passing through the two fulcrum parts 1342 by the torsional elastic deformation of the two fulcrum parts 1342.

Furthermore, the rotating part 1341 of this embodiment has a first end E1 and a second end E2 located on opposite sides of the rotation axis A2, respectively. The distance L1 between the first end E1 and the rotation axis A2 is greater than the distance L2 between the second end E2 and the rotation axis A2, and the second engaging part 134a is located at the first end E1. Accordingly, when the rotating part 1341 rotates along the rotation axis A2, the second engaging part 134a has a larger displacement to smoothly disengage from the first engaging part 1121.

In this embodiment, the elastic movable part 134, as shown in FIG. 6, has a protrusion 1343 formed at the second end E2 of the rotating part 1341. The pushing part 1222 has a guiding ramp G1 (shown in FIG. 12A and FIG. 12B), and the protrusion 1343 has a guiding ramp G2 (shown in FIG. 12A and FIG. 12B). When the locking member 130 slides from the released position to the locked position as shown in FIG. 12A to FIG. 12C, causing the protrusion 1343 to approach the pushing part 1222, the protrusion 1343 is guided by the pushing part 1222 and passes over the pushing part 1222 by the guidance of the guiding ramps G1 and G2. Furthermore, the pushing part 1222 has a first bearing ramp G3 (indicated in FIG12C), and the protrusion 1343 has a second bearing ramp G4 (indicated in FIG12C). After the protrusion 1343 passes over the pushing part 1222 as shown in FIG12C, the second bearing ramp G4 rests against the first bearing ramp G3 to position the locking member 130 and keep it stably in the locked state.

In summary, in the scissors of this invention, the first handle has a first engaging portion and the locking member has a second engaging portion. The locking member in the released position can engage with the first engaging portion via its second engaging portion, thereby preventing the user from accidentally touching the locking member and causing it to slide to the locked position during operation of the scissors. Furthermore, the second engaging portion is located in the elastic movable portion of the locking member, and the second handle has a pushing portion. Therefore, when the user wants to lock the scissors using the locking mechanism with the first and second grips close together, the locking mechanism can be slid from the released position towards the locked position. This causes the elastic movable part to move towards the pushing part of the second grip and be pushed by the pushing part, resulting in elastic deformation of the elastic movable part. This causes the second engaging part to disengage from the first engaging part, thus smoothly sliding the locking mechanism to the locked position. This prevents the locking mechanism from interfering with the normal operation of the scissors and allows for convenient locking of the scissors.

100: Scissors 110: First blade body 112: First grip 1121: First engaging part 112a, 122a: Groove 120: Second blade body 122: Second grip 1221: First locking part 1222: Pushing part 130: Locking element 132: Main body 1321: Second locking part 1322: Locking tenon 132a: Groove 134: Elastic movable part 1341: Rotating part 1342: Fulcrum part 1343: Protrusion 134a: Second engaging part A1: Connecting axis A2: Rotation axis D1, D2: Direction E1: First end E2: Second end G1, G2: Guide slope G3: First bearing slope G4: Second bearing slope L1, L2: Distance; S1: First segment; S2: Second segment; W1, W2: Width

Figure 1 is a perspective view of scissors according to an embodiment of the present invention. Figure 2 is an exploded view of the scissors of Figure 1. Figure 3 is a perspective view of a partial structure of the scissors of Figure 1. Figure 4A shows the two handles of Figure 1 brought close together to close the scissors. Figure 4B shows the locking element of Figure 4A locking the scissors. Figure 5A is a cross-sectional view of the scissors of Figure 4A along line G-G. Figure 5B is a cross-sectional view of the scissors of Figure 4B along line H-H. Figure 6 is a perspective view of the locking element of Figure 1. Figure 7 is a perspective view of a partial structure of the scissors of Figure 1. Figures 8A, 8B, 9A, and 9B show the locking element of Figure 7 restricted from sliding to the locked position. Figure 10 is a perspective view of a partial structure of the scissors of Figure 4A. Figures 11A to 11C and Figures 12A to 12C illustrate the locking element of Figure 10 sliding to the locked position.

110: First Blade Body

112: First Grip

1121: First Card Combination

120: Second blade

122: Second Grip

1222: Pushing Department

130: Locking component

132: Subject

134: Elastic movable part

1343:convex part

134a: Second Card Section

G1, G2: Guiding ramps G1, G2: Guiding ramps

Claims (9)

A pair of scissors includes: a first blade body including a first handle, wherein the first handle has a first engaging portion; a second blade body hinged to the first blade body and including a second handle, wherein the second handle has a pushing portion and a first locking portion; and a locking member slidably disposed on the first handle and including a main body and a flexible movable portion, the main body having a second locking portion, the flexible movable portion being connected to the main body and having a second engaging portion adapted to engage with the first engaging portion, wherein when the second handle approaches the first handle and the locking member slides, the flexible movable portion is adapted to be pushed and deformed by the pushing portion to disengage the second engaging portion from the first engaging portion, so that the second locking portion can lock the first locking portion. The elastic movable part includes a rotating part and two fulcrum parts. The two opposite sides of the rotating part are respectively connected to the main body through the two fulcrum parts, so that the rotating part can rotate along a rotation axis passing through the two fulcrum parts by elastic deformation of the two fulcrum parts. The scissors as claimed in claim 1, wherein the locking member is adapted to slide between a released position and a locked position when the first grip is slidable, and when the second grip approaches the first grip and the locking member slides from the released position toward the locked position, the elastic movable part moves toward the pushing part and is pushed and deformed by the pushing part. The scissors as described in claim 1, wherein the body has a slot in which the elastic movable part is disposed. The scissors as claimed in claim 1, wherein the rotating part has a first end and a second end located on opposite sides of the axis of rotation, the distance between the first end and the axis of rotation being greater than the distance between the second end and the axis of rotation, and the second engaging part being located at the first end. The scissors as described in claim 1, wherein the second engaging portion includes a spring arm adapted to abut against the first engaging portion. The scissors as described in claim 1, wherein the elastic movable part has a protrusion that, when the locking member slides to bring the protrusion close to the pushing part, the protrusion is pushed by the pushing part and then passes over the pushing part. The scissors as claimed in claim 6, wherein at least one of the push portion and the protrusion has a guide ramp, wherein when the locking member slides to bring the protrusion close to the push portion, the protrusion is adapted to pass over the push portion by being guided by the guide ramp. The scissors as described in claim 6, wherein the pushing portion has a first abutting ramp and the protrusion has a second abutting ramp, and the second abutting ramp rests against the first abutting ramp after the protrusion has passed the pushing portion. The scissors as described in claim 1, wherein the second handle has a groove, the width of a first section of the groove being greater than the width of a second section of the groove, the groove forming the first locking portion in the second section, the second locking portion being located within the first section when the second handle is close to the first handle and the second locking portion engages with the first locking portion, and the second locking portion being located within the second section when the second handle is close to the first handle and the second locking portion locks the first locking portion.