Safety mechanism of pencil sharpener and automatic pencil sharpener

Abstract

The utility model discloses a pencil sharpener safety mechanism and an automatic pencil sharpener, the pencil sharpener safety mechanism comprises a machine body, the side direction of the machine body is provided with a scrap cavity, and the side wall of the scrap cavity is provided with an insertion hole; a scrap box; the safety switch is arranged in the jack and is used for allowing or preventing the motor from running; and the inserting buckles are arranged on the surface of the waste chip box, and the inserting buckles are matched with the inserting holes in an inserting mode. According to the safety mechanism of the pencil sharpener, a trigger part and a buckle structure in the prior art are combined into a whole, so that a motor of the pencil sharpener can operate normally under the condition that the position of a waste chip box is correctly installed and locked, and potential safety hazards caused by unlocking of the position of the waste chip box are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic pencil sharpeners, and more specifically to a pencil sharpener safety mechanism and an automatic pencil sharpener. Background Art

[0002] Automatic pencil sharpeners are a convenient office supplies. They can be divided into top-opening and side-opening types according to the different opening methods. After the top cover of the top-opening automatic pencil sharpener is opened, the pencil shavings in the waste chamber need to be dumped. This design ensures that the knife holder will stop running during cleaning, which improves safety and reduces the risk of accidental injury. When the side-opening automatic pencil sharpener is opened, the waste box is pulled out, and the knife holder and the knife are exposed.

[0003] In order to avoid potential safety problems caused by exposing the knife to the outside, CN 210309706 U discloses a pencil sharpener refill thickness adjustment structure and a pencil sharpener using the refill thickness adjustment structure. The patent solution includes a side wall of a waste chip barrel having a contact portion, the contact portion triggers a safety switch, and a snap structure for limiting the waste chip barrel is provided on the housing of the pencil sharpener.

[0004] However, in the above patent solution, when the snap structure is unlocked and the trigger part is in place, the safety switch is triggered to control the start of the motor, which poses a safety hazard. Summary of the invention

[0005] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model proposes a pencil sharpener safety mechanism, which combines the trigger part and the buckle structure in the prior art into one, so that the motor can only operate normally when the pencil sharpener is correctly installed and locked in the waste box position, thereby avoiding the safety hazard caused by unlocking the waste box position.

[0006] The utility model also provides a pencil sharpener with the safety mechanism.

[0007] The technical solution adopted by the utility model is to provide a pencil sharpener safety mechanism, including:

[0008] The machine body has a waste chip cavity on its side, and a plug hole is provided on the side wall of the waste chip cavity;

[0009] Waste box;

[0010] A safety switch, disposed in the socket, for allowing or preventing the motor from running;

[0011] A buckle is arranged on the surface of the waste box, and the buckle is plugged into and matched with the socket.

[0012] Compared with the prior art, the present invention combines the trigger part and the buckle structure into one, that is, the buckle can not only have the function of triggering the safety switch, but also serve as a buckle structure to limit the installation position of the waste box. When the buckle is unlocked, the safety switch is immediately disconnected to turn off the motor. This design allows the motor to operate normally only when the pencil sharpener is correctly installed and locked in the waste box position, thereby avoiding the safety hazard caused by the waste box being unlocked.

[0013] According to an embodiment of the utility model, the waste box has a screw column, and the buckle has a matching hole adapted to the screw column; the buckle is installed on the waste box through the screw column, which reduces the difficulty of injection mold molding.

[0014] According to an embodiment of the present invention, one of the screw column and the matching hole is provided with a positioning protrusion, and the other is provided with a positioning notch corresponding to the position of the positioning protrusion.

[0015] According to an embodiment of the utility model, the buckle has a countersunk groove, and the fastener passes through the countersunk groove to be connected to the screw column; the head of the fastener is buried in the countersunk groove to avoid the head of the fastener interfering with the operation of the claw.

[0016] According to one embodiment of the utility model, the buckle has a body and a pair of claws formed by extending from the body, the driving rod of the safety switch is offset from the claws, and the body is used to abut against the driving rod to trigger the safety switch. When the buckle body does not reach the predetermined position, the safety switch cannot be activated, thereby preventing the operation of the motor. Such a design can effectively avoid the occurrence of accidental injuries. The claws of the buckle are offset from the driving rod of the safety switch. This means that when the buckle is plugged into the socket, the claws will not collide with the driving rod, thereby reducing the occurrence of accidental triggering of the safety switch. This design further increases the safety of the pencil sharpener, ensuring that the tool holder can only be started when the waste box is fully installed and the buckle is firmly connected to the claws.

[0017] According to an embodiment of the utility model, a guide portion is provided at the bottom of the waste chip chamber, and a guide rib is provided on the waste chip box corresponding to the guide portion; the setting of the guide portion and the guide rib plays an alignment and guiding role for the waste chip box to be inserted sideways into the waste chip chamber.

[0018] According to an embodiment of the utility model, the side wall of the waste chip chamber is provided with a limiting rib, and the limiting rib is used to limit the side wall of the waste chip box to fit with the side wall of the waste chip chamber.

[0019] According to an embodiment of the utility model, a stylus block and a start switch are further provided in the body, the stylus block is transmission-connected to the trigger end of the start switch, and the start switch is used to allow or prevent the motor from running.

[0020] According to an embodiment of the present utility model, the stylus block is connected to the start switch via a trigger rod and a linkage rod.

[0021] According to an embodiment of the present invention, the width of the driving rod is not greater than the distance H between the two claws.

[0022] An automatic pencil sharpener comprises any one of the above-mentioned pencil sharpener safety mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional diagram of an automatic pencil sharpener in an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the automatic pencil sharpener in the embodiment of the utility model;

[0026] Figure 3 This is a structural diagram of an automatic pencil sharpener in an embodiment of the utility model;

[0027] Figure 4 A three-dimensional diagram of the fuselage in the embodiment of the utility model;

[0028] Figure 5 It is a front view of the automatic pencil sharpener in the embodiment of the utility model;

[0029] Figure 6 for Figure 5 Sectional view along line AA;

[0030] Figure 7 for Figure 5 Sectional view along the midline BB;

[0031] Figure 8 for Figure 7 A partial enlarged view of point C in the middle;

[0032] Fig. 9 A three-dimensional diagram of a waste box in an embodiment of the utility model;

[0033] Fig.10 This is a schematic diagram of the structure of the fuselage in the embodiment of the utility model;

[0034] Fig.11 This is a schematic diagram of the internal structure of the fuselage in the embodiment of the utility model;

[0035] Fig.12 An exploded view of the waste box and the buckle in the embodiment of the utility model;

[0036] Fig.13 A three-dimensional diagram of a buckle in an embodiment of the utility model;

[0037] Fig.14 A half-section view of the buckle in the embodiment of the utility model;

[0038] Fig.15 It is a rear view of the buckle in the embodiment of the utility model.

[0039] Description of the numbers in the figure:

[0040] 1. Body; 2. Waste box; 3. Buckle; 4. Safety switch; 5. Upper shell; 6. Pen feed assembly; 7. Stylus block; 8. Tool holder; 9. Motor; 10. Gear set; 11. Turntable; 12. Trigger lever; 13. Linkage lever; 14. Start switch; 15. Elastic element; 16. Transmission rod; 17. Transmission gear;

[0041] 1a, waste chip chamber; 1b, insertion hole; 1c, guide part; 1d, limiting rib;

[0042] 2a, guide rib; 2b, screw column; 2c, positioning protrusion;

[0043] 3a, claw; 3b, countersunk groove; 3c, positioning notch; 3d, matching hole; 3e, body;

[0044] 4a. Driving rod. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Embodiment 1

[0046] like Figure 1-15 As shown, in this embodiment, a pencil sharpener safety mechanism is disclosed, comprising:

[0047] The body 1 has a waste cavity 1a formed on its side, and a plug hole 1b is formed on the side wall of the waste cavity 1a;

[0048] Waste box 2;

[0049] A safety switch 4 is disposed in the socket 1b and is used to allow or prevent the motor 9 from running;

[0050] A buckle 3 is arranged on the surface of the waste box 2, and the buckle 3 is plugged into and matched with the socket 1b;

[0051] The buckle 3 has a body 3e and a pair of claws 3a extending from the body 3e. The driving rod 4a of the safety switch 4 is staggered with the claws 3a, and the body 3e is used to abut against the driving rod 4a to trigger the safety switch 4.

[0052] Furthermore, in this embodiment, the body 1 is provided with a waste chamber 1a laterally, and the waste box 2 slides laterally into the waste chamber 1a. The waste chamber 1a has a bottom wall and a side wall, and the sharpener's blade 8 is located at the upper side of the waste chamber 1a. Accordingly, the waste box 2 has an upward opening for receiving pencil shavings cut by the blade 8. A group of guide portions 1c formed by protrusions are provided on the bottom wall of the waste chamber 1a, and a guide rib 2a is provided at the bottom of the waste box 2. The guide rib 2a cooperates with the guide portion 1c to guide the waste box 2 to slide laterally into the waste chamber 1a, so that the buckle 3 is aligned with the socket 1b.

[0053] Furthermore, a limiting rib 1d is provided on the side wall of the waste chamber 1a, and the limiting rib 1d is used to limit the side wall of the waste box 2 to fit with the side wall of the waste chamber 1a.

[0054] Specifically, combined Fig.12 As shown, the rear protrusion of the waste box 2 is provided with a screw column 2b, and the buckle 3 has a matching hole 3d adapted to the screw column 2b; the buckle 3 is installed on the waste box 2 through the screw column 2b, which reduces the difficulty of injection molding. In this embodiment, the outer peripheral protrusion of the screw column 2b is provided with a positioning protrusion 2c, and the matching hole 3d is provided with a positioning notch 3c corresponding to the position of the positioning protrusion 2c. The rear end of the body 3e of the buckle 3 has a countersunk groove 3b, which is connected to the matching hole 3d at the front end of the body 3e. The fastener passes through the countersunk groove 3b and is connected to the screw column 2b; the head of the fastener is buried in the countersunk groove 3b to prevent the head of the fastener from interfering with the operation of the claw 3a.

[0055] Furthermore, combined with Figure 13-14As shown, in this embodiment, the body 3e of the buckle 3 is cylindrical, the front part is hollow to form a matching hole 3d, and the rear end is recessed to form a countersunk groove 3b. The countersunk groove 3b is connected to the matching hole 3d through a small hole adapted to the fastener rod. The rear end of the body 3e of the buckle 3 extends backward to form a pair of claws 3a, and the claws 3a are arranged at intervals, and the spacing H is greater than the width of the driving rod 4a. And the claws 3a are flat lines, and there is a height difference X between the lower edge of the claws 3a and the lower edge of the body 3e, and the height difference X is greater than the trigger stroke of the driving rod 4a. When the buckle 3 is inserted into the socket 1b, the driving rod 4a of the safety switch 4 is triggered by the lower edge of the body 3e. Due to the existence of the height difference X, even if the claw 3a contacts the driving rod 4a of the safety switch 4 during the insertion process, due to the contour limit of the waste box 2 and the waste cavity 1a, and the contour limit of the buckle 3 body 3e and the socket 1b, the safety switch 4 will not be accidentally touched.

[0056] Specifically, combined Figure 1-11 As shown, in this embodiment, a stylus block 7 and a start switch 14 are further provided in the body 1. The stylus block 7 is transmission-connected to the trigger end of the start switch 14. The start switch 14 is used to allow or prevent the motor 9 from running. The stylus block 7 is connected to the start switch 14 via a trigger rod 12 and a linkage rod 13.

[0057] Further, in this embodiment, the body 1 is provided with an upper shell 5, a pen feed assembly 6, a stylus block 7, a tool holder 8, a motor 9, a gear set 10, a turntable 11, a trigger rod 12, a linkage rod 13, a start switch 14, an elastic element 15, a transmission rod 16 and a transmission gear 17. The upper cover is provided with a pen feed assembly 6, a turntable 11 for driving the pen feed assembly 6 to rotate, a transmission gear 17 meshing with the outer teeth of the turntable 11, a stylus block 7 and a trigger rod 12. The outer side of the stylus block 7 is combined with the upper end of the trigger rod 12 to form an inclined wedge structure, which changes the lateral movement of the stylus block 7 into the axial movement of the trigger rod 12. The upper end of the linkage rod 13 abuts against the lower end of the trigger rod 12, and the axial movement of the trigger rod 12 drives the linkage rod 13 to move synchronously. The start switch 14 is fixedly mounted at the lower end of the linkage rod 13. When the start switch 14 and the safety switch 4 are triggered at the same time, the motor 9 is allowed to run.

[0058] Furthermore, in this embodiment, the motor 9 drives the tool holder 8 to rotate through the gear set 10, and also drives the transmission rod 16 to rotate synchronously. The upper end of the transmission rod 16 is meshed with the transmission gear 17. The transmission rod 16 drives the rotating disk 11 to rotate through the transmission gear 17, thereby driving the pen feeding assembly 6 to feed the pen. The elastic element 15 is a coil spring, and the upper end of the coil spring is connected to the linkage rod 13, so that the linkage rod 13 has an elastic tendency to remain in the position where the start switch 14 is not triggered.

[0059] Combination Figure 1-7As shown, in another embodiment, an automatic pencil sharpener is disclosed, comprising the pencil sharpener safety mechanism described in this embodiment.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0065] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A pencil sharpener safety mechanism, characterized in that: include: The machine body has a waste chip cavity on its side, and a plug hole is provided on the side wall of the waste chip cavity; Waste box; A safety switch, disposed in the socket, for allowing or preventing the motor from running; A buckle is arranged on the surface of the waste box, and the buckle is plugged into and matched with the socket.

2. A pencil sharpener safety mechanism according to claim 1, characterized in that: The waste box has a screw column, and the buckle has a matching hole adapted to the screw column.

3. A pencil sharpener safety mechanism according to claim 2, characterized in that: One of the screw column and the matching hole is provided with a positioning protrusion, and the other is provided with a positioning notch corresponding to the position of the positioning protrusion; and / or The buckle has a countersunk groove, and the fastener passes through the countersunk groove and is connected with the screw column.

4. A pencil sharpener safety mechanism according to claim 1, characterized in that: The buckle comprises a body and a pair of claws extending from the body, a driving rod of the safety switch and the claws are staggered, and the body is used to abut against the driving rod to trigger the safety switch.

5. A pencil sharpener safety mechanism according to claim 1, characterized in that: The side wall of the waste chip chamber is provided with a limiting rib, and the limiting rib is used to limit the side wall of the waste chip box to fit with the side wall of the waste chip chamber.

6. A pencil sharpener safety mechanism according to claim 1, characterized in that: A stylus block and a start switch are also provided in the body. The stylus block is in transmission connection with a trigger end of the start switch. The start switch is used to allow or prevent the motor from running.

7. A pencil sharpener safety mechanism according to claim 6, characterized in that: The stylus block is connected to the start switch via a trigger rod and a linkage rod.

8. A pencil sharpener safety mechanism according to claim 1, characterized in that: A guide portion is provided at the bottom of the waste cavity, and a guide rib is provided at the waste box corresponding to the guide portion.

9. An automatic pencil sharpener, characterized in that: The utility model comprises the pencil sharpener safety mechanism as claimed in any one of claims 1 to 8.

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