A double-ended crayon for adults

Abstract

This utility model discloses a double-ended crayon for adults, aiming to provide a crayon with a retractable tip to prevent accidental application and improve usability. It includes: two outer tubes, each with a spiral guide groove on its inner wall; two inner tubes, each sleeved with a corresponding outer tube, each with a guide groove on its side wall; two sets of sliders, each slider housed within a corresponding inner tube, each slider having a core mounted on its top, and a guide block on its outer wall that passes through a guide groove and embeds into the guide groove; and a center block, which is a double-ended structure, with both ends rotatably sleeved with corresponding outer tubes and both ends connected to corresponding inner tubes. The beneficial effect of this utility model is that rotating the tail block allows for axial movement of the sliders within the inner tubes, enabling the core to extend during use and retract into the outer tubes when not in use, thus preventing accidental application and improving usability.

Description

Technical Field

[0001] This utility model relates to the field of stationery technology, and in particular to a double-ended crayon for adults. Background Technology

[0002] Double-ended crayons are a popular and common drawing tool enjoyed by both children and adults. Crayons are generally made from a mixture of paraffin wax and pigments; due to the hardness of paraffin wax, their double-ended structure allows them to produce two colors.

[0003] Existing crayons are usually made into sticks and then wrapped in a layer of wrapping paper. The wrapping paper prevents the crayon wax from sticking to your hands, making it easy to use and store. To use, simply tear off the wrapping paper at the end to expose the crayon.

[0004] When tearing open the packaging, fingernails may damage the crayon tip, causing it to break during use. This results in poor performance due to the instability of the tip. Additionally, most existing crayons are straight and cannot be extended, leaving the tip exposed after the packaging is removed, which can lead to accidental application during use.

[0005] The structure of crayons needs to be improved to enhance their effectiveness. Utility Model Content

[0006] This invention aims to overcome the shortcomings of existing technologies, such as exposed and non-retractable nibs, resulting in poor usability. It provides a double-ended crayon for adults with a retractable nib to prevent accidental smudging and improve usability.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a double-ended crayon for adults, comprising:

[0008] Two outer tubes, the inner wall of which is provided with a spiral guide groove;

[0009] Two inner tubes are sleeved with corresponding outer tubes, and the inner tubes are provided with guide grooves on their side walls;

[0010] Two sets of sliders are placed inside corresponding inner tubes. A rod core is installed on the top of each slider. A guide block is provided on the outer wall of the slider. The guide block passes through the guide groove and is embedded in the guide rail groove.

[0011] The center block has a double-headed structure, with its two ends respectively rotatably connected to the corresponding outer tube and its two ends respectively connected to the corresponding inner tube.

[0012] This crayon includes two sets of outer tubes, inner tubes, sliders, and a center block. The outer tube serves as the crayon's grip, and the inner tube is fitted inside the outer tube. The slider is located inside the inner tube, and a crayon core is mounted on the slider. Different sliders have different colored cores, allowing a single crayon to have two colors. A guide groove with a spiral arrangement is provided on the inner wall of the outer tube. A guide groove is provided on the inner tube, and a guide block is provided on the outer side of the slider. This guide block can slide within the guide groove, and its end is embedded in the guide groove. A center block with a double-ended structure is located at the lower end of the outer tube; both ends of the center block are fitted onto the outer tube, allowing for a rotatable connection. Both ends of the center block are connected to the inner tube. With the center block fixed, when the outer tube is rotated, the inner tube and outer tube rotate relative to each other. At the same time, the slider placed inside the inner tube can move vertically along the guide groove under the guidance of the guide groove and guide rail groove, thereby allowing the crayon tip to enter and exit the outer tube and achieve a telescopic action. When not in use, rotating the outer tube allows the tip of the crayon tip to be stored inside the outer tube. This structure enables the telescopic storage of the crayon tip, ensuring that the tip is not accidentally used when not in use and improving the usage effect.

[0013] Preferably, the guide groove is a strip-shaped groove, arranged coaxially with the inner tube. Stop grooves are connected to the upper and lower ends of the guide groove, and these stop grooves are arranged radially with the inner tube. Specifically, the guide groove is a strip-shaped groove, vertically arranged, and coaxial with the inner tube. Stop grooves are provided at both the upper and lower ends of the guide groove, radially arranged with the inner tube. The guide block can enter the stop groove along the guide groove. When the guide block slides into the upper stop groove, the rod core stops extending outwards; when the guide block slides into the lower stop groove, the rod core stops retracting, completing the storage of the pen tip. This structure enables the extension and retraction of the rod core, thereby improving the usability.

[0014] Preferably, the top of the slider is provided with a mounting groove, and the inner wall of the mounting groove is provided with several retaining strips. The retaining strips are arranged coaxially with the mounting groove, and the rod core is engaged with the retaining strips. Specifically, the mounting groove at the top of the slider and the several retaining strips on the inner wall of the mounting groove are arranged vertically. The rod core is engaged in the mounting groove. The retaining strips improve the fixing and engaging effect of the rod core, ensuring the stability of the rod core when entering and exiting the outer tube, and improving the performance.

[0015] Preferably, the guide block includes a connecting rod and a guide wheel. The guide wheel is rotatably connected to the end of the connecting rod, the connecting rod is placed in a guide groove, and the guide wheel is placed in a guide rail groove. Specifically, the guide block includes a connecting rod and a guide wheel. The connecting rod is connected to the side wall of the slider and is arranged at an angle matching the guide rail groove. Simultaneously, the guide wheel is rotatably connected to the end of the connecting rod, causing relative rotation between the guide wheel and the connecting rod. The connecting rod, placed in the guide groove, can slide along the guide groove, while the guide wheel is embedded in the guide rail groove and can slide within it. This structure allows the slider to move axially within the inner tube through the relative rotation of the outer and inner tubes, thereby driving the pen tip to press tightly against the outer tube. When not in use, the pen tip retracts, preventing accidental application and improving usability.

[0016] Preferably, the lower inner wall of the guide rail groove is provided with several limiting grooves, and the guide wheel is fitted into the limiting grooves. Specifically, the several limiting grooves on the lower inner wall of the guide rail groove are evenly spaced. When the guide wheel slides along the guide rail groove, it contacts the upper inner wall of the guide rail groove, thus guiding the movement. When the rod core is adjusted outwards, the guide wheel is embedded in the limiting groove, ensuring that the rod core will not move during use, guaranteeing the stability of the rod core, and improving the performance.

[0017] Preferably, a locking block is provided at the bottom of the inner wall of the outer tube, and a locking groove is provided at the middle of the outer wall of both ends of the central block. The locking block is engaged with the locking groove, and a spring is sleeved in the locking groove. The two ends of the spring are in contact with the end face of the locking block and the inner wall of the locking groove, respectively. The outer tube has a locking block at the bottom of its inner wall that engages with an annular groove in the middle of the outer wall of the center block. This structure allows for the rotational connection between the outer tube and the center block. A spring is also installed in the groove, engaging with it. The two ends of the spring contact the end face of the locking block and the inner wall of the groove, respectively. The spring's elasticity ensures a stable connection between the center block and the outer tube. When the center block is pressed down, the guide wheel contacts the upper inner wall of the guide rail groove, facilitating the rotation of the center block to extend the adjustment rod. When the center block is adjusted, the spring's elasticity pushes it outward, allowing the guide wheel to be stably embedded in the limiting groove. This improves the stability of the rod during drawing, ensuring optimal performance.

[0018] Preferably, the end face of the locking block is provided with an annular positioning groove, and the inner wall of the lower end of the groove is provided with an annular positioning block, which is embedded in the positioning groove. Specifically, the positioning groove on the end face of the locking block is annular, and the positioning block on the inner wall of the lower end of the groove is embedded in the positioning groove. When the center block is pressed down, the positioning block contacts the bottom surface of the positioning groove, ensuring stable contact between the guide wheel and the guide rail groove, thus guaranteeing stable guiding effect and improving its performance.

[0019] Preferably, the upper end of the outer tube is provided with a conical opening, the conical opening having an inner wall that contacts the rod core. The conical opening at the upper end of the outer tube has a conical outer contour and is internally a hollow tube, ensuring stable support for the extended rod core and guaranteeing good performance.

[0020] The beneficial effects of this utility model are as follows: the axial movement of the slider inside the inner tube can be achieved by rotating the central block, so that the stick core can be extended when in use and retracted into the outer tube when not in use, avoiding accidental application and thus improving the use effect; several limiting grooves are provided on the lower surface of the guide rail groove, which can match and correspond to the guide wheel. When the guide wheel is engaged in the limiting groove, the extended stick core is stabilized, ensuring good use effect; the spring installed on the central block can improve the stability of the guide wheel embedded in the limiting groove, thereby improving the use effect of the crayon when drawing. Attached Figure Description

[0021] Figure 1 This is a sectional view of the present invention;

[0022] Figure 2 This is a cross-sectional view of the outer tube in this utility model;

[0023] Figure 3 This is a three-dimensional view of the inner tube in this utility model;

[0024] Figure 4 yes Figure 1 Enlarged view at point A in the middle;

[0025] Figure 5 yes Figure 1 Enlarged view at point B in the middle.

[0026] In the attached diagram, 1. Outer tube, 2. Inner tube, 3. Slider, 4. Center block, 5. Rod core, 10. Guide rail groove, 11. Limiting groove, 12. Locking block, 13. Positioning groove, 14. Receiving head, 20. Guide groove, 21. Stop groove, 30. Guide block, 31. Mounting groove, 32. Locking strip, 33. Connecting rod, 34. Guide wheel, 40. Locking groove, 41. Spring, 42. Positioning block. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0030] Example 1, as Figure 1-5 As shown, a double-ended crayon for adults includes:

[0031] Two outer tubes 1, the inner wall of which is provided with a spiral guide groove 10;

[0032] Two inner tubes 2 are sleeved with corresponding outer tubes 1, and the inner tubes 2 are provided with guide grooves 20 on their side walls;

[0033] Two sets of sliders 3 are placed in corresponding inner tubes 2. A rod core 5 is installed on the top of the slider 3. A guide block 30 is provided on the outer side wall of the slider 3. The guide block 30 passes through the guide groove 20 and is embedded in the guide rail groove 10.

[0034] The center block 4 has a double-headed structure. Both ends of the center block 4 are rotatably connected to the outer tube 1, and the center block 4 is connected to the inner tube 2.

[0035] The guide groove 20 is a strip-shaped groove, and the guide groove 20 is arranged coaxially with the inner tube 2. The upper end and the lower end of the guide groove 20 are respectively connected to the stop groove 21, and the stop groove 21 is arranged radially with the inner tube 2.

[0036] The top of the slider 3 is provided with an installation groove 31, and the inner wall of the installation groove 31 is provided with a plurality of retaining strips 32. The retaining strips 32 are arranged coaxially with the installation groove 31, and the rod core 5 is engaged with the retaining strips 32.

[0037] The guide block 30 includes a connecting rod 33 and a guide wheel 34. The guide wheel 34 is rotatably connected to the end of the connecting rod 33. The connecting rod 33 is placed in the guide groove 20, and the guide wheel 34 is placed in the guide rail groove 10.

[0038] The lower inner wall of the guide rail groove 10 is provided with several limiting grooves 11, and the guide wheel 34 is matched and embedded in the limiting grooves 11.

[0039] A locking block 12 is provided at the bottom of the inner wall of the outer tube 1, and a locking groove 40 is provided in the middle of the outer wall of the center block 4. The locking block 12 is engaged with the locking groove 40, and a spring 41 is sleeved on the locking groove 40. The two ends of the spring 41 are in contact with the end face of the locking block 12 and the inner wall of the locking groove 40, respectively.

[0040] The end face of the card block 12 is provided with an annular positioning groove 13, and the inner wall of the lower end of the card groove 40 is provided with an annular positioning block 42, which is embedded in the positioning groove 13.

[0041] The upper end of the outer tube 1 is provided with a retractable head 14, which has a conical structure and the inner wall of the retractable head 14 is in contact with the rod core 5.

[0042] The working principle of this utility model is as follows: Figure 1-5 As shown, this crayon includes two sets of outer tubes 1, inner tubes 2, sliders 3, and a center block 4. The outer tube 1 serves as the crayon's grip, the inner tube 2 is fitted inside the outer tube 1, and the slider 3 is placed inside the inner tube 2, with the crayon core 5 mounted on it. A guide groove 10, spirally arranged, is provided on the inner wall of the outer tube 1. A guide groove 20 is provided on the inner tube 2, and a guide block 30 is provided on the outer side of the slider 3. This guide block 30 can slide within the guide groove 20, and its end is embedded in the guide groove 10. A center block 4, a double-ended structure, is located at the lower end of the outer tube 1. Both ends of the center block 4 are fitted onto the outer tubes 1, allowing the two outer tubes 1 to be rotatably connected to the center block 4. Simultaneously, both ends of the center block 4 are connected to the inner tube 2. With the fixed center block 4 in place, when the outer tube 1 is rotated, the inner tube 2 rotates relative to the outer tube 1. At the same time, the slider 3 placed inside the inner tube 2 can move vertically along the guide groove 20 under the guidance of the guide groove 20 and the guide rail groove 10, thereby enabling the crayon core 5 to enter and exit the outer tube 1 and achieve telescopic action. When not in use, rotating the outer tube 1 allows the tip of the crayon core 5 to be stored inside the outer tube 1. This structure enables the telescopic storage of the crayon core 5, ensuring that the tip of the crayon core 5 is not accidentally painted when not in use, thus improving the usage effect.

[0043] The guide groove 20 is a strip-shaped groove, and it is vertically arranged and coaxial with the inner tube 2. At the same time, a stop groove 21 is provided at the upper and lower ends of the guide groove 20. The stop groove 21 is radially arranged with the inner tube 2. The guide block 30 can enter the stop groove 21 along the guide groove 20. When the guide block 30 slides into the upper stop groove 21 along the guide groove 20, the rod core 5 stops extending outward. When the guide block 30 slides into the lower stop groove 21 along the guide groove 20, the rod core 5 stops retracting, thus completing the storage of the pen tip of the rod core 5. This structure can realize the extension and retraction of the rod core 5, thereby improving the usage effect.

[0044] The slider 3 has a mounting groove 31 at its top and several locking strips 32 on its inner wall. The locking strips 32 are arranged vertically. The rod core 5 is inserted into the mounting groove 31. The locking strips 32 can improve the fixing and locking effect of the rod core 5, ensure the stability of the rod core 5 when entering and exiting the outer tube 1, and improve the use effect.

[0045] The guide block 30 includes a connecting rod 33 and a guide wheel 34. The connecting rod 33 is connected to the side wall of the slider 3 and is arranged at an angle that matches the guide groove 10. The guide wheel 34 is rotatably connected to the end of the connecting rod 33, so that the guide wheel 34 and the connecting rod 33 rotate relative to each other. The connecting rod 33 is placed in the guide groove 20 and can slide along the guide groove 20. At the same time, the guide wheel 34 is embedded in the guide groove 10 and can slide within the guide groove 10. This structure allows the slider 3 to move axially within the inner tube 2 through the relative rotation of the outer tube 1 and the inner tube 2, thereby driving the core 5 to press against the outer tube 1. When not in use, the tip of the core 5 retracts to avoid accidental application and improve the application effect.

[0046] Several limiting grooves 11 are provided on the inner wall of the lower end of the guide rail groove 10. These limiting grooves 11 are arranged at equal intervals. When the guide wheel 34 slides along the guide rail groove 10, the guide wheel 34 contacts the inner wall of the upper end of the guide rail groove 10 to slide along the guide rail groove 10, which plays a guiding role. When the extension adjustment of the rod core 5 is completed, the guide wheel 34 is embedded in the limiting groove 11 to ensure that the rod core 5 will not move during use, thus ensuring the stability of the rod core 5 and improving the use effect.

[0047] The outer tube 1 has a locking block 12 at the bottom of its inner wall that engages with an annular groove 40 in the middle of the outer wall of the center block 4. This structure allows for the rotational connection between the outer tube 1 and the center block 4. A spring 41 is installed in the groove 40, engaging with it. The two ends of the spring 41 contact the end face of the locking block 12 and the inner wall of the groove 40, respectively. The spring force of the spring 41 ensures a stable connection between the center block 4 and the outer tube 1. When the center block 4 is pressed down, the guide wheel 34 contacts the upper inner wall of the guide rail groove 10, facilitating the rotation of the center block 4 to extend the adjustment rod 5. When the adjustment of the center block 4 is complete, the spring force of the spring 41 pushes the center block 4 outwards, allowing the guide wheel 34 to be stably embedded in the limiting groove 11. This improves the stability of the rod 5 during drawing, ensuring good performance.

[0048] The card block 12 has a positioning groove 13 on its end face. The positioning groove 13 is annular. At the same time, a positioning block 42 is provided on the inner wall of the lower end of the card slot 40. The positioning block 42 is embedded in the positioning groove 13. When the center block 4 is pressed down, the positioning block 42 contacts the bottom surface of the positioning groove 13, which can ensure that the guide wheel 34 is in stable contact with the guide rail groove 10, thereby ensuring stable guiding effect and improving its use effect.

[0049] A retractable head 14 is provided on the upper end of the outer tube 1. The outer contour of the retractable head 14 is tapered, and the inside of the structure is a hollow tube. This structure can ensure stable support for the extended rod core 5 and ensure good performance.

[0050] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A double-ended crayon for adult use, characterized in that it comprises: Two outer tubes (1), the inner wall of which is provided with a spiral guide groove (10). Two inner tubes (2) are sleeved with corresponding outer tubes (1), and the inner tubes (2) are provided with guide grooves (20) on their side walls. Two sets of sliders (3), the sliders (3) are placed in the corresponding inner tubes (2), the top of the sliders (3) is equipped with a rod core (5), the outer side wall of the sliders (3) is provided with a guide block (30), the guide block (30) passes through the guide groove (20) and is embedded in the guide rail groove (10); The center block (4) has a double-headed structure. The two ends of the center block (4) are respectively rotatably connected to the corresponding outer tube (1), and the two ends of the center block (4) are respectively connected to the corresponding inner tube (2).

2. A double-ended candle for adults according to claim 1, characterized in that The guide groove (20) is a strip groove. The guide groove (20) is arranged coaxially with the inner tube (2). The upper end and lower end of the guide groove (20) are respectively connected to the stop groove (21). The stop groove (21) is arranged radially with the inner tube (2).

3. A double ended candle for adults as claimed in claim 1 wherein, The top of the slider (3) is provided with an installation groove (31), and the inner wall of the installation groove (31) is provided with a number of locking strips (32). The locking strips (32) are arranged coaxially with the installation groove (31), and the rod core (5) is engaged with the locking strips (32).

4. The dual tip candle for adults according to claim 1, wherein The guide block (30) includes a connecting rod (33) and a guide wheel (34). The guide wheel (34) is rotatably connected to the end of the connecting rod (33). The connecting rod (33) is placed in the guide groove (20), and the guide wheel (34) is placed in the guide rail groove (10).

5. A double-ended crayon for adults according to claim 4, characterized in that, The lower inner wall of the guide rail groove (10) is provided with several limiting grooves (11), and the guide wheel (34) is matched and embedded in the limiting groove (11).

6. A double-ended crayon for adults according to claim 1, characterized in that, The bottom of the inner wall of the outer tube (1) is provided with a locking block (12), and the middle of the outer wall of both ends of the central block (4) is provided with a locking groove (40). The locking block (12) is engaged with the locking groove (40), and a spring (41) is sleeved on the locking groove (40). The two ends of the spring (41) are in contact with the end face of the locking block (12) and the inner wall of the locking groove (40), respectively.

7. A double-ended crayon for adults according to claim 6, characterized in that, The end face of the card block (12) is provided with an annular positioning groove (13), and the inner wall of the lower end of the card groove (40) is provided with an annular positioning block (42), which is embedded in the positioning groove (13).

8. A double-ended crayon for adults according to claim 1, characterized in that, The upper end of the outer tube (1) is provided with a receiving head (14), which is a conical structure, and the inner wall of the receiving head (14) is in contact with the rod core (5).

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