TW201800272A - Clamping mechanism of pencil sharpener capable of providing a clamping condition of excellent elastic force to ensure an effect of stably clamping the pencil - Google Patents

Abstract

The present invention relates to a clamping mechanism of a pencil sharpener. The pencil sharpener is provided with a clamping mechanism, which comprises a front cover, a clamping disk, multiple clamping jaws, and a tension spring, wherein the front cover that is configured to receive a pencil to penetrate therethrough is protrudingly provided, on a lower part of an inside surface thereof, with a coupling piece. The clamping disk that is configured to receive the pencil to penetrate therethrough is formed with a plurality of through holes in a circumferential area of a center thereof, and has a disk surface one side of which is provided with a jointing piece at a location close to an upper end. The multiple clamping jaws are rotatably mounted to the front cover at inner side surface thereof and corresponding to the penetration of the pencil for rotation in the through holes. The tension spring is configured to perform a linearly stretching tension and has two ends respectively connected to the coupling piece and the jointing piece, at an inclined angle, between the front cover and the clamping disk. With the tension spring being simply and quickly assembled on the pencil sharpener and the tension spring always performs linear stretching and elastic returning whether the pencil is clamped by or released from the clamping jaws, so that the clamping mechanism provides a clamping condition of excellent elastic force to ensure an effect of stably clamping the pencil.

Description

Pen sharpener holding mechanism

The present invention relates to the technical field of pencil sharpeners for use in rotary pencils, and more particularly to a clamping mechanism used by a pencil sharpener to rotate an inserted pencil.

Press, the pencil sharpeners used to rotate the pencil core are generally provided with a clamping mechanism, which is used to clamp the pencil inserted into the pencil sharpener, so as to rotate the handle to drive the cutting tool along the circumference of the pencil Rotate and cut to reveal the sharpened pen for writing.

The clamping method of traditional pencil sharpener pen tools is shown in Figures 8, 9, and 10. The body (70) of the pencil sharpener is provided with one end fixed at both ends to elastically push the front cover (71) and one A guide cover (711), a front cover (71) and a corresponding fixed guide cover (711) are provided with a clamping mechanism (72), which comprises a C-shaped elastic ring (73), a clip The disc (74) and the number of clamps (75), wherein the two ends of the opening of the elastic ring (73) are respectively hooked to the shaft pivot (712) on the inner surface of the front cover (71) and the clamp disc (74) In a clamping hole (741), a center of the front cover (71) is provided with a through hole (713), and a three-division positioning post (714) is protruded from the periphery of the through hole (713), and the disk of the clamping plate (74) A hole (742) is set in the center of the body, and a long hole (743) is provided on the periphery of the hole (742). The hole (742) corresponds to the positioning post (714) of the front cover (71) and receives the elastic force of the elastic ring (73). Rotate and swing, and the positioning post (714) of the clamp plate (74) is sleeved on the clamp piece (75), and the actuating side of each clamp piece (75) is provided with a fan-shaped tooth edge (751); When the gripper mechanism (72) of the sharpener operates the grip pen, it is used to press the movable lever (74) on the top side of the grip disc (74). 4), make the guide lever (715) of the guide cover (711) approach, the clamp disc (74) is elastically deformed in conjunction with the elastic ring (73), and each clamp element (75) rotates with the positioning post (714) Center, according to the elastic rotation to reveal the pen hole (742) of the clip plate (74), and then insert the pen from the through hole (713) of the front cover (71), the clip plate (74) The hole (742) is inserted into the body (70). After the pen is positioned, the movable operating lever (744) is released to restore the elasticity of the elastic ring (73) of the clamp disc (74) and interlock the clamp element ( 75), so that the tooth edge (751) of the clamping member (75) is used to clamp the peripheral edge side of the pen, and then the cutting tool part (not shown) of the main body (70) is used to cut the pen.

However, in the related process of clamping mentioned above, there are some problems that need to be improved in its structure; such as:

1. The C-shaped elastic ring is a rigid metal material, which has a specific bending rigid elastic tension. Therefore, it is necessary to use a special tool to hook the two ends to the front cover and the clip disc smoothly when combined. The assembly operation is slower and reduces the productivity.

2. The C-shaped elastic ring utilizes the elastic tension formed by its bending. After the elastic force is released, the clamping member can generate a strong clamping force on the writing instrument, but it also causes the clamping member to have concave and convex teeth on the writing instrument. Occlusive tooth marks are left on the peripheral edge side, which affects the overall turning appearance of the pen.

As another conventional pencil sharpener, as shown in FIG. 11, the mechanism for holding a pen improves the design of the toothed edge (751) of the clamping member (75), and the clamping member (80) in this figure A cam member (81) structure is formed, and a rubber layer (82) is further coated on the outer side of the cam member. By the elastic tension of the elastic ring (73), the clamp member (80) can use the rubber layer (82) to The clip fastens the outer peripheral side of the pen, making the pen less likely to damage the surface.

However, there are still some problems with the structure shown in Figure 11; such as:

1. The C-shaped elastic ring (73) is adopted, because the elastic ring (73) with large elasticity still has the disadvantages of slow assembly, time-consuming and other factors, and reduced production efficiency.

2. The clamping member (80) is a manual assembly of the rubber layer (82) one by one on the outer side of each cam member (81), which also indirectly increases the assembly operation time and operating cost; further, the rubber layer ( 82) In the process of clamping the pen tool, the rubber layer (82) is liable to be contaminated with the cutting pen powder ink, which makes the pen tool slip during the turning process, that is, the pen tool rotates together with the rotating power of the cutting tool It is difficult to achieve the purpose of cutting pens.

In view of the foregoing problems, the present inventors have made intensive research and development. Therefore, the main object of the present invention is to provide a pencil sharpener holding mechanism, which mainly replaces the C-shaped elastic ring with a linear extension spring. The elastic tension of the tension spring and the angle set obliquely, thereby achieving the purpose of easy assembly and sufficient elasticity to clamp the pen.

Another object of the present invention is to provide a pencil sharpener holding mechanism. The main clamping member is a hard plastic arm seat, which is integrally formed on the outside by a soft plastic layer to cover it. Reduce assembly costs and increase production speed.

The invention provides a pen sharpener holding mechanism, which comprises a front cover including a guide cover combined with a receiving space between the front cover and the guide cover. The front cover is guided by the guide. The cover is fixed to the ends of several rod bodies of the body. A fixed operating lever protrudes from the top side of the front cover. A first through hole for pencil insertion is provided toward the center of the inner side of the body. With the hole as the center, a shaft pivot post is protruded at each of the three equal positions on the peripheral side of the first through hole, and a coupling member is protruded below the inner side of the front cover, and the center of the guide cover is aligned with the first through hole of the front cover. A second through hole is provided; a clip plate has a pair of holes corresponding to the first and second through holes in the center, and a through hole is provided on the disc surface at three thirds of the periphery of the hole. The through-hole system includes a connection opening of an open groove, a movable operating lever is extended on the upper side of the clamp disc, and an engaging member is protruded at a position near and above the side of the disc surface; A number of clamps are included, each of which includes a cam-shaped arm seat, the arm seat is provided with a penetrating perforation at an eccentric position correspondingly pivoted to the shaft pivot post, and a pillar is provided at the rear side of the arm seat For snapping to the connection opening of the through-hole open slot, which can be connected to move the pivot; a tension spring, which is a spring with linear tensile tension, includes two ends, a first end and a The second end, the first end facing upward is connected to the joint, and the second end facing downward is connected to the joint, so that the tension spring is installed at the front at a moderate inclination relative to the horizontal line. Cover with the clip dial.

The clip includes the hard plastic, cam-shaped arm seat, and is integrally formed on the outer side with a soft plastic soft plastic layer. The arm seat forms an inclined surface at one place, and the soft plastic layer The thickness at the inclined surface is defined as a first latching surface, and the clamping end adjacent to the corresponding distal end of the pillar is defined as the thickness of the soft plastic layer which is significantly thinner than the first latching surface. For a second stop.

Therefore, the overall mechanism of the present invention can provide the following effects:

1. The present invention changes the previous C-shaped rigid elastic ring, and uses a linear stretch elastic spring as the first spring. Only the first and second ends of the spring are connected between the clamp plate and the front cover. No special tools are required. Easy assembly, thus significantly reducing operating costs and assembly man-hours.

2. The tension spring of the present invention is connected to the clamp disc and the front cover at an inclination state, so whether the clamp element is in a clamped or loose state, the tension spring is stretched or released in a straight line. In this state, the tension spring exerts its optimal elastic state to ensure that the clamping member has the elasticity for holding the pencil.

3. The clamp function of the present invention does not need to improve the design accuracy. The clamp member is formed by a hard plastic arm seat and integrally covered with a soft plastic layer of soft plastic, and the soft plastic layer is used to clamp the pen. As a result, the soft plastic layer does not leave uneven marks on the pencil, and the arm seat and the soft plastic layer are integrally formed. Therefore, the manufacturing of the clamping member does not need to be manually assembled, so that the pencil sharpener can reduce the cost of manufacturing or assembly and further enhance Market Competitiveness.

〔this invention〕

(10) ‧‧‧Body

(11) ‧‧‧Body

(15) ‧‧‧Clamping mechanism

(20) ‧‧‧Front cover

(21) ‧‧‧Guide

(211) ‧‧‧Second through hole

(22) ‧‧‧Fixed joystick

(23) ‧‧‧First through hole

(231) ‧‧‧Pivot Post

(24) ‧‧‧Combination

(30) ‧‧‧Clip Switch

(31) ‧‧‧jack

(32) ‧‧‧Through Hole

(321) ‧‧‧Access port

(33) ‧‧‧Activity lever

(34) ‧‧‧Joint

(36) ‧‧‧Clip

(361) ‧‧‧arm seat

(362) ‧‧‧Perforated

(363) ‧ ‧ pillar

(364) ‧‧‧Slope

(365) ‧‧‧Clip end

(37) ‧‧‧Soft plastic layer

(371) ‧‧‧ First Noodle

(372) ‧‧‧Second Switch Noodle

(40) ‧‧‧Spring

(41) ‧‧‧First End

(42) ‧‧‧Second End

(50) ‧‧‧Pencil

〔Usually〕

(70) ‧‧‧Body

(71) ‧‧‧Front cover

(711) ‧‧‧Guide

(712) ‧‧‧Shaft Pivot

(713) ‧‧‧through hole

(714) ‧‧‧Positioning post

(715) ‧‧‧Fixed joystick

(72) ‧‧‧Clamping mechanism

(73) ‧‧‧Elastic ring

(74) ‧‧‧Clip Switch

(741) ‧‧‧Clip

(742) ‧‧‧jack

(743) ‧‧‧long hole

(744) ‧‧‧Activity lever

(75) ‧‧‧Clip

(751) ‧‧‧Tooth margin

(80) ‧‧‧Clip

(81) ‧‧‧Cam

(82) ‧‧‧Rubber layer

The first figure is an exploded schematic view of a three-dimensional component according to a preferred embodiment of the present invention.

The second figure is a schematic front plan view of a clamping member according to a preferred embodiment of the present invention.

The third figure is a three-dimensional schematic view of a clip member according to a preferred embodiment of the present invention.

The fourth figure is a schematic plan view of the original state of a non-clamped pen according to a preferred embodiment of the present invention.

The fifth figure is a schematic plan view of a pre-clamping pen according to a preferred embodiment of the present invention.

The sixth figure is a schematic plan view of a clipped end view of a preferred embodiment of the present invention.

The seventh figure is a schematic plan view of a loose end of the preferred embodiment of the present invention.

The eighth figure is a conventional three-dimensional exploded view.

The ninth figure is a schematic end-view plan view of the original state of the conventional unclamped pen.

The tenth figure is a schematic plan view of an end view of a conventional clip pen.

FIG. 11 is a three-dimensional exploded view of another conventional clamping mechanism.

The present invention relates to a pencil sharpening mechanism of a pencil sharpener. Please refer to the first figure. The pencil sharpener is provided with a body (10) and a clamping mechanism (15), which includes a front cover (20), a A clamp disc (30), a tension spring (40), and a number of clamp members (36), as shown in the first and fourth figures, one end of the body (10) is provided with a number of rod bodies (11) that can be advanced and retreated horizontally. , The end of the rod body (11) is connected to the front cover (20), the front cover (20) includes a fixed guide cover (21), and there is an accommodation between the front cover (20) and the guide cover (21) Space, the front cover (20) and the guide cover (21) are engaged with each other, so that the front cover (20) is fixedly connected to the end of the rod body (11) by the guide cover (21), and the top side of the front cover (20) protrudes A fixed lever (22) is extended to facilitate the operation of the front cover (20) and the clamping mechanism (15). The front cover (20) is provided with a pencil (50) for the center of the inner side of the body (10) The first through hole (23) is inserted, the inner side of the front cover (20) is centered on the first through hole (23), and a shaft pivot post (231) is protruded at each of three equal positions on the peripheral side. The front cover (231) 20) A coupling member (24) is protruded below the inner side, and the center of the guide cover (21) is aligned with the first through hole (23) of the front cover (20) and a second through hole (211); The center of the plate (30) penetrates a jack (31) corresponding to the first and second through holes (23) (211), and the disk surface of the clamp plate (30) is arranged at three places on the periphery of the jack (31). A through hole (32), the through hole (32) is a connection opening (321) including an open groove, a movable lever (33) is extended on the upper side of the clamp plate (30), and a protrusion is arranged near the upper side of the plate surface An engaging member (34); as shown in the first, second, and third figures, the clamp members (36) are used to be pivoted on the front cover (20) and linked by the clamp plate (30), The clamping member (36) is composed of a hard plastic, cam-shaped arm seat (361) on the outer side integrally formed with a soft plastic soft plastic layer (37), and the arm seat (361) is eccentric. There is a through hole (362) passing through to correspond to the pivot pin (231) of the front cover (20), so that the through hole (362) can be pivoted through the through hole (32) of the clamp plate (30) A pillar (363) is provided on the rear side of the arm pivot (231), and the arm seat (361) is fixed on the connection opening (321) of the open slot of the through hole (32), so that The clamping member (36) is pivoted with the connection opening (321) as the linkage point; in addition, as shown in the second and third figures, the clamping member (36) forms an inclined plane at one place of the arm seat (361). (364), because the arm seat (361) is cam-shaped, and the soft plastic layer (37) is used to cover the outer periphery, as shown in the fourth figure, the thickness of the soft plastic layer (37) at the inclined surface (364) The thicker is defined as a first latching surface (371), a clamping latching end (365) adjacent to it and located at the corresponding distal end of the pillar (363), the shape of the soft plastic layer (37) is a round convex surface, and the thickness is Significantly thinner than the first catch surface (371), so it is defined as a second catch surface (372); As shown in the first and fourth figures, the tension spring (40) is a spring with linear tensile tension and includes two ends, which are the first end (41) and the second end (42), respectively. One end (41) is connected to the engaging member (34) provided on the clamp plate (30), and the second end (42) facing downward is connected to the connecting member (24) provided on the front cover (20). The installation type of the spring (40) with an inclination angle relative to the horizontal line, the inclination angle range can be between 35 ° ~ 55 °, and the preferred angle is 45 °; the aforementioned clamping disc (30), clamping element (36) and The tension spring (40) is installed after the front cover (20), the guide cover (21) covers the aforementioned components and is snap-fitted to the front cover (20), thereby completing the assembly of the clamping mechanism (15).

Please refer to the first and fourth figures. When the clamping mechanism (15) is not used in a stationary state, the movable lever (33) and the fixed lever (22) have a distance from each other, and three equally distributed clamps The detent (36) is closed to the first through hole (23); when the cutting pencil (50) is to be used, as shown in the first, fifth and sixth figures, when preparing to clamp the pen, press the fixed lever with two fingers (23) and the movable operating lever (33), because the clamping lever (30) of the movable operating lever (33) is connected with the tension spring (40), the clamping lever (30) can be driven to rotate when pressed, and used The tension of the tension spring (40) causes the clamp disc (30) to cause relative rotation. By rotating the clamp disc (30), the clamp element (36) is pivoted at the connection opening (321). The post (231) is eccentrically rotated and swung as a fulcrum, causing the clip (36) to form an opening, so that the pencil (50) has space from the first through hole (23) to be inserted into the body (10) of the pencil sharpener; secondly, When the movable operating lever (33) is loosened, it conforms to the elastic restoring force of the tension spring (40), and the clamp disc (30) swings in the reverse direction, so that the second latch surface (372) of the clamp end (365) can be Hold the pencil (50) tightly and clamp it on the outer edge of the pencil (50). At this time, you can rotate and cut the pencil (50).

After the pencil (50) is cut, press the movable lever (33) to bring it close to the fixed lever (22) to drive the clamp disc (30) to rotate, so that the clamp element (36) is synchronized with the shaft The pivot (231) is a pivot pivot. The latching surface (372) is deflected back to the first latching surface (371) and is located on the outer peripheral side of the pencil (50). During the recovery process, since the inner arm seat (361) of the first latching surface (371) is an inclined surface (364) ), So the thickness of the first latching surface (371) of the soft plastic layer (37) is relatively thick, which can provide a moderate elastic restoring force, so that when the clamping member (36) rotates in the reverse direction, it passes through the first latching surface ( 371), causing the pencil (50) to have a relatively small amount of rotational movement, the side surface of the outer periphery of the pencil (50) will not stay in the soft plastic layer (37) due to friction, so that the pencil (50) can be quickly detached The clip (36) is held in a loose state, and the cut pencil (50) can be removed.

In summary, the invention as a whole has industrial applicability and innovative benefits, and its structure has not been seen in books or publications. It is in line with the requirements for patent applications for inventions. .

For those who need to be clear, the above is the technical principle that is immediately applied to the specific implementation of the present invention. If the changes made according to the concept of the present invention still have functions that do not exceed the spirit covered by the description and drawings, All should be within the scope of the present invention and shared by Chen Ming.

(15) ‧‧‧Clamping mechanism

(20) ‧‧‧Front cover

(22) ‧‧‧Fixed joystick

(23) ‧‧‧First through hole

(231) ‧‧‧Pivot Post

(24) ‧‧‧Combination

(30) ‧‧‧Clip Switch

(31) ‧‧‧jack

(33) ‧‧‧Activity lever

(34) ‧‧‧Joint

(36) ‧‧‧Clip

(361) ‧‧‧arm seat

(362) ‧‧‧Perforated

(364) ‧‧‧Slope

(365) ‧‧‧Clip end

(37) ‧‧‧Soft plastic layer

(371) ‧‧‧ First Noodle

(372) ‧‧‧Second Switch Noodle

(40) ‧‧‧Spring

(41) ‧‧‧First End

(42) ‧‧‧Second End

Claims (6)

A pencil sharpener holding mechanism of the pencil sharpener. The pencil sharpener is provided with a clamping mechanism, which includes a front cover including a guide cover combined with an accommodation space between the front cover and the guide cover. The front cover is fixed by the guide cover and the ends of several rod bodies of the body. A fixed lever is protruded from the top side of the front cover. A first through hole for pencil insertion is provided toward the center of the inner side of the body. The side is centered on the first through hole, and a shaft pivot post is protruded at each of three equal positions on the peripheral side of the first through hole. A coupling member is protruded below the inner side of the front cover, and the center of the guide cover is aligned with the front. A first through hole is covered and a second through hole is provided; a clip plate has a pair of holes corresponding to the first and second through holes in the center, and the disk surface of the clip plate is divided into three equal parts on the periphery of the hole. A through hole is provided at each place, and the through hole includes an opening of an open slot. The upper side of the clamp plate is provided with a movable operating lever, and an engaging member is protruded near the upper side of the disk surface. The clip includes a cam-shaped arm seat, and the arm seat is provided with a through-hole at the eccentric position to correspondingly pivot on the pivot The back of the arm seat is provided with a pillar for engaging with the connection opening of the through-hole open slot, and can be connected with a movable pivot; a tension spring, which is a spring with linear tensile tension, including two ends Is a first end and a second end, the first end facing upward is connected to the joint, and the second end facing downward is connected to the joint. A moderate inclination angle is installed on the front cover and the clip disc. According to the pencil sharpener holding mechanism described in item 1 of the scope of patent application, wherein the clamping member includes the hard plastic, cam-shaped arm seat, and a soft plastic is integrally formed on the outer side surface. A soft plastic layer, the arm seat forms a bevel at one place, and the soft plastic layer has a thicker thickness at the bevel and is defined as a first catch surface, which is adjacent to the clip end at the corresponding distal end of the pillar, The thickness of the soft plastic layer is significantly thinner than the first latching surface, and is defined as a second latching surface. The pencil holder of the pencil sharpener according to item 1 of the scope of patent application, wherein the tension spring phase The inclination angle range for this horizontal line is between 35 ° ~ 55 °. According to the pen sharpener holding mechanism described in item 3 of the scope of patent application, wherein the preferred inclination angle of the tension spring is 45 °. According to the pencil sharpener holding mechanism of the pencil sharpener described in item 1 of the scope of the patent application, the protruding piece of the front cover can be set as a shaft. According to the pen sharpener holding mechanism described in item 1 of the scope of the patent application, wherein the engaging member protruding from the clamping disc can be set as a shaft.