Marking device

Abstract

The invention provides an engraving device which is simple in structure, capable of reliably resetting and capable of enabling an index body to accurately rotate for a cycle, embedded into a concave part of a forming die and comprises a hollow cylinder body, a first hole, a second hole, a first rotating shaft and a second rotating shaft, the driving part is provided with a first base body and a second base body; the first base body is provided with a first sawtooth part on the periphery of the first hole in the hollow cylinder; the second base body is provided with a second sawtooth part embedded into the first base body; the first connecting rod is fixed on the second base body and extends to the lower part of the engraving device through the first hole; a first driving / driven part including a third base body provided with a third serrated part that meshes with the first serrated part and the second serrated part, and provided with a fourth serrated part on a surface opposite to a surface on which the third serrated part is provided; the second driving and driven part comprises a fourth base body and a second connecting rod, the fourth base body is provided with a fifth sawtooth part meshed with the fourth sawtooth part, and the second connecting rod is connected with the fourth base body and is provided with a cylindrical expanded head part; an index body is arranged on the upper side of the head.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202480020138.X (22) Application Date 2024.04.11 (85) PCT International Application Entering National Phase Date 2025.10.13 (86) PCT International Application Application Data PCT / JP2024 / 014703 2024.04.11 (87) PCT International Application Publication Data WO2025 / 215799 JA 2025.10.16 (71) Applicant: Uraya Shoji Co., Ltd. Address: 3-10-22 Himeri, Nishiyodogawa-ku, Osaka City, Osaka Prefecture, Japan (72) Inventor: Naoto Uraya (74) Patent Agency: Shenzhen Wanshang Tianqin Intellectual Property Agency (General Partnership) 44279 Patent Attorney Pan Xiaoling (51) Int.Cl. B29C 45 / 27 (2006.01) B29C 33 / 42 (2006.01) (54) Invention Title: Engraving Device (57) Abstract: This invention provides an engraving device with a simple structure, reliable resetting capability, and the ability to accurately rotate an index body for one cycle. The device is embedded in the recess of a molding die and includes: a hollow cylinder with a first hole in the center of its lower part; a driving part having: a first base with a first serrated portion around the first hole in the hollow cylinder; a second base with a second serrated portion embedded in the first base; a first connecting rod fixed to the second base and extending through the first hole to the lower part of the engraving device; a first driving / driven part including a third base having a third serrated portion that meshes with the first and second serrated portions, and a fourth serrated portion on a surface opposite to the surface with the third serrated portion; a second driving / driven part including a fourth base and a second connecting rod, the fourth base having a fifth serrated portion that meshes with the fourth serrated portion, the second connecting rod being connected to the fourth base and having a cylindrically enlarged head; and an index body on the upper side of the head.Claims 1 page, Description 9 pages, Drawings 10 pages, CN 121127356 A 2025.12.12 CN 1 21 12 73 56 A 1. An engraving device, embedded in a recess of a molding die, characterized in that the engraving device comprises: a hollow cylindrical body having a first hole at its lower center; a driving part, the driving part comprising: a first base having a first serrated portion at the periphery of the first hole in the hollow cylindrical body; a second base having a second serrated portion embedded in the first base; a first connecting rod fixed to the second base and extending through the first hole to the lower part of the engraving device; a first driving / driven part, the first driving / driven part comprising a third base having a third serrated portion meshing with the first serrated portion and the second serrated portion, and a fourth serrated portion on a surface opposite to the surface having the third serrated portion; The second driving / driven part includes a fourth base and a second connecting rod. The fourth base has a fifth serrated portion that meshes with the fourth serrated portion. The second connecting rod is connected to the fourth base and has a cylindrically enlarged head. An index body is provided on the upper side of the head. 2. The engraving device according to claim 1, wherein the second driving / driven part further includes: a cover portion disposed on the upper part of the hollow cylinder and having a cylindrical portion with a centrally protruding cylindrical portion; a fifth base portion located below the cover portion and fixed to the hollow cylinder, having a sixth serrated portion on its upper surface; the second connecting rod passing through the cover portion and the fifth base portion; and the second connecting rod having a seventh serrated portion on the lower side of the head that meshes with the sixth serrated portion. 3. The engraving device according to claim 1, characterized in that: the first serrated portion and the second serrated portion have serrations with the same period; when the second substrate is embedded in the first substrate, the serrations of the first serrated portion and the serrations of the second serrated portion are arranged in a staggered periodic manner, and the third serrated portion meshes with the first serrated portion. 4. The engraving device according to claim 3, characterized in that: the periodic offset between the serrations of the first serrated portion and the serrations of the second serrated portion is 0.1 to 0.9 periods. 5. The engraving device according to claim 1, characterized in that: the third serrated portion is a single tooth or a double tooth. 6. The engraving device according to claim 1, characterized in that: a first force-applying means is provided between the third substrate and the fifth substrate, and a second force-applying means is provided between the fourth substrate and the fifth substrate. 7. The engraving device according to claim 1, characterized in that: the indicator body is mounted on the upper side of the head by a connecting means.Claims 1 / 1 page 2 CN 121127356 A Engraving Device Technical Field

[0001] This invention relates to an engraving device. Background Art

[0002] In an injection molding machine, a movable mold base plate (movable type) moves in a direction close to or away from a fixed mold base plate (fixed type), thereby realizing the mold base plate closing (mold closing) and opening (mold opening). Molten synthetic resin is supplied to the cavity inside the mold after mold closing, and after the molten synthetic resin solidifies, a molded article is formed.

[0003] When mass-producing products, an engraving device is used because it is necessary to engrave the manufacturing number or manufacturing date on the surface of the product. The method of engraving the manufacturing number or manufacturing date is as follows: the engraving device equipped with an engraving display part is inserted into the cavity side of the molding mold, and the mold is formed in the inserted state, so that the engraving content is directly engraved on the surface of the molded article.

[0004] An engraving device has been proposed in the prior art. This device can prevent operators from working in an unreasonable posture, prevent body parts from contacting the mold substrate and being burned, and can also change the display of the indicator. It has excellent heat resistance and durability, simple structure and low cost (for example, see Patent Document 1). The engraving device described in Patent Document 1 includes: an outer shell with text or symbols engraved on the circumference of the upper end face of a hollow cylindrical body; an upper drive / driven mechanism disposed on the upper part of the hollow part of the outer shell; and a lower drive mechanism disposed on the lower part of the hollow part of the outer shell.

[0005] The engraving device of Patent Document 1 discloses a structure in which the connecting rod is driven by the air pressure generated by the lower drive mechanism, and the display part is rotated by the meshing between the serrated parts provided in the upper drive / driven mechanism and the meshing between the serrated parts and the protrusions provided on the rotor. The engraving device comprises the following parts: an outer shell, which is a hollow cylinder with text or symbols engraved on the circumference of its upper end face; an upper drive / driven mechanism disposed on the upper part of the hollow portion of the outer shell; and a lower drive mechanism disposed on the lower part of the hollow portion of the outer shell. The upper drive / driven mechanism includes: an outer cylinder fixed inside the outer shell with a meshing portion at its upper end; an inner cylinder fitted inside the outer cylinder with a meshing portion at its upper end; a rotor fitted inside the outer shell, consisting of a solid or hollow cylinder; and a force-applying means for applying a downward force to the rotor. The inner cylinder is connected to a piston via a connecting rod. In a first state, the rotor is engaged with the outer cylinder, and in a second state, it is disengaged; in the first state, the rotor is disengaged from the inner cylinder, and in the second state, it is engaged. The lower drive mechanism includes: a cylinder through which compressed air is introduced via a vent connected to a compressed air source; and a piston fitted inside the cylinder and driven by the compressed air, the cylinder being fitted into the outer shell.

[0006] This marking device utilizes the engagement and disengagement of the rotor with the serrated portion of the outer cylinder, and the engagement and disengagement of the rotor with the serrated portion of the inner cylinder (which is in a different phase from the serrated portion of the outer cylinder), to move the protrusion of the rotor by one tooth pitch, thereby causing the index to rotate one cycle. The inner surface of the outer cylinder is provided with a longitudinal slit, while the outer surface of the inner cylinder is provided with ribs.

[0007] However, in the marking device of Patent Document 1, the protrusion provided at the lower part of the rotor engages with the serrations of the second serrated portion of the inner cylinder to drive the rotor to rotate; during resetting, the protrusion engages with the outer cylinder. Therefore, by simply moving the inner cylinder up and down, it is sometimes impossible to reset the serrated portion of the inner cylinder to the correct position, thus, there is a problem that the index cannot be accurately rotated for one cycle.

[0008] [Prior Art Documents] [Patent Documents] Specification 1 / 9 pages 3 CN 121127356 A [Patent Document 1] Patent No. 7239195. Summary of the Invention

[0009] The inventors have conducted in-depth research to solve the above-mentioned problems, aiming to provide an engraving device with a simple structure, reliable resetting capability, and the ability to accurately rotate the index body for one cycle.

[0010] The engraving device according to claim 1 of the present invention is an engraving device embedded in the recess of a molding die, characterized in that the engraving device comprises: a hollow cylindrical body with a first hole in the center of its lower part; a driving part, the driving part comprising: a first base with a first serrated portion on the periphery of the first hole in the hollow cylindrical body; a second base with a second serrated portion embedded in the first base; a first connecting rod fixed to the second base and extending through the first hole to the lower part of the engraving device; a first driving and driven part having a third base, the third base having a third serrated portion that meshes with the first serrated portion and the second serrated portion, and a fourth serrated portion on a surface opposite to the surface with the third serrated portion; a second driving and driven part having a fourth base and a second connecting rod, the fourth base having a fifth serrated portion that meshes with the fourth serrated portion, the second connecting rod being connected to the fourth base and having a cylindrically enlarged head; an index body being provided on the upper side of the head.

[0011] The engraving device according to claim 2 of the present invention is characterized in that the second driving / driven part further includes: a cover part, which is disposed on the upper part of the hollow cylinder and has a cylindrical part protruding in the central part; a fifth base body, which is located below the cover part and fixed to the hollow cylinder body, and has a sixth serrated part on its upper surface; a second connecting rod passing through the cover part and the fifth base body, and the second connecting rod having a seventh serrated part that meshes with the sixth serrated part on the lower side of the head.

[0012] The engraving device according to claim 3 of the present invention is characterized in that: the first serrated portion and the second serrated portion have serrations with the same period, and when the second substrate is embedded in the first substrate, the serrations of the first serrated portion and the serrations of the second serrated portion are arranged in a staggered period, and the third serrated portion meshes with the first serrated portion.

[0013] The engraving device according to claim 4 of the present invention is characterized in that: the periodic offset between the serrations of the first serrated portion and the serrations of the second serrated portion is 0.1 to 0.9 periods.

[0014] The engraving device according to claim 5 of the present invention is characterized in that: the third serrated portion is a single tooth or a double tooth.

[0015] The engraving device according to claim 6 of the present invention is characterized in that: a first force-applying means is provided between the third substrate and the fifth substrate, and a second force-applying means is provided between the fourth substrate and the fifth substrate.

[0016] The engraving device according to claim 7 of the present invention is characterized in that: the index body is installed on the upper side of the head by a connecting means.

[0017] In the engraving device according to claim 1 of the present invention, the outermost sawtooth of the double teeth constituting the third sawtooth portion engages with the first sawtooth portion. Therefore, when the first connecting rod rises, the second sawtooth portion engages with the innermost sawtooth of the double teeth constituting the third sawtooth portion. Thus, the movement of the drive unit can be reliably transmitted to the first drive / driven unit and the second drive / driven unit, so that the index body can be reliably rotated by one scale in one operation. When a series of operations are completed, the second base body will descend to the bottom in the hollow cylinder. At this time, the third base body will also descend in the hollow cylinder, and the sawtooth of the first sawtooth portion will engage with the outermost sawtooth of the double teeth constituting the third sawtooth portion. Since the second base body cannot rotate in the hollow cylinder, the first sawtooth portion and the second sawtooth portion can be reset to their positional relationship before the start of the operation at the bottom of the hollow cylinder. The double teeth constituting the third sawtooth portion are fixed in the third base body. Therefore, the serrations of the first serration engage with the outermost serration of the double teeth constituting the third serration, allowing the first, second, and third serrations to be reset to the correct position. As a result, an engraving device with a simple structure, reliable reset capability, and accurate rotation of the index body throughout one cycle can be obtained.

[0018] In the engraving device according to claim 2 of the present invention, the second connecting rod penetrates the cover and the fifth base. A cylindrically enlarged head provided on the second connecting rod can move up and down within the cylindrical portion and can rotate within the cylindrical portion. Since the second connecting rod is protected inside the cylindrical portion, reliable movement and rotation of the second connecting rod can be ensured.Furthermore, since a seventh serrated portion that meshes with the sixth serrated portion is provided on the lower side of the head, and an index body is provided on the upper side of the head, the index body can be reliably rotated for one cycle in a single operation.

[0019] In the engraving device according to claim 3 of the present invention, when the first connecting rod is not subjected to a force from below, the first serrated portion and the second serrated portion have serrations with the same period. Before the operation begins, the serrations of the first serrated portion and the second serrated portion form a double tooth with a staggered period. When the first connecting rod is not subjected to a force from below, the third serrated portion meshes with the first serrated portion. Therefore, when one operation is completed, the first serrated portion and the third serrated portion can be reset to the fully engaged position. As a result, the operation can be performed reliably.

[0020] In the engraving device according to claim 4 of the present invention, as long as the period stagger between the serrations of the first serrated portion and the serrations of the second serrated portion is 0.1 to 0.9 cycles, the first serrated portion and the third serrated portion can be reset to the fully engaged position.

[0021] In the engraving device according to claim 5 of the present invention, the third serrated portion can be a single tooth or a double tooth. If it is a single tooth, the structure is simple and can be manufactured at low cost; if it is a double tooth, the first serrated portion and the third serrated portion can mesh more reliably, thereby reliably achieving reset.

[0022] In the engraving device according to claim 6 of the present invention, a first force-applying means is provided between the third substrate and the fifth substrate, and a second force-applying means is provided between the fourth substrate and the fifth substrate. Therefore, when the sixth serrated portion and the seventh serrated portion mesh, the third substrate will move downward and the fourth substrate will move upward, thereby resetting the engraving device to the state before the start of operation.

[0023] In the engraving device according to claim 7 of the present invention, the indicator body is mounted on the upper side of the head by a connecting means. Since the indicator body is mounted on the head of the second connecting rod by a connecting means, the indicator body can be replaced according to the purpose of use.

[0024] FIG1 is a cross-sectional view of the engraving apparatus of the present invention mounted on a mold substrate; FIG2 is a perspective view of the engraving apparatus of the present invention; FIG3 is a cross-sectional view of the engraving apparatus shown in FIG2 along the A-A' direction; FIG4 is an exploded perspective view of the engraving apparatus shown in FIG2; FIG5 is a schematic diagram for explaining the operation of the engraving apparatus of the present invention; FIG6 is a schematic diagram for explaining another operation of the engraving apparatus of the present invention; FIG7 is a schematic diagram for explaining another operation of the engraving apparatus of the present invention; FIG8 is a schematic diagram for explaining another operation of the engraving apparatus of the present invention; FIG9 is a schematic diagram for explaining another operation of the engraving apparatus of the present invention; FIG10 is a schematic diagram for explaining another operation of the engraving apparatus of the present invention. Detailed Description

[0025] Hereinafter, embodiments of the engraving apparatus of the present invention will be described with reference to the accompanying drawings. FIG1 is a cross-sectional view of the engraving apparatus of the present invention mounted on a mold substrate. Figure 2 is a perspective view of the engraving apparatus of the present invention, and Figure 3 is a cross-sectional view of the engraving apparatus shown in Figure 2 along the A-A' direction. Figure 4 is an exploded perspective view of the engraving apparatus shown in Figure 2.

[0026] The engraving apparatus 2 of the present invention is mounted on a mold substrate. As shown in Figure 1, for example, the upper surface of the engraving apparatus 2 of the present invention is flush with the surface of the cavity and is tightly embedded in the recess of the mold substrate 1. In addition, a display panel 28 marked with numbers, text, etc. is installed around the upper surface of the engraving apparatus 2 shown in Figure 2. In Figure 1, the mechanism connected to the lower part of the first connecting rod 9 extending from the bottom surface of the engraving apparatus 2 is not shown. The engraving apparatus 2 is driven by moving the first connecting rod 9 in the vertical direction. There are no particular limitations on the driving means that generate the vertical movement. High-pressure air from a compressed air source or the like can be used to move it vertically, an electric motor or the like can be used to move it vertically, and known driving means can also be used.

[0027] First Embodiment

[0028] As shown in Figures 3 and 4, the engraving device 2 of the present invention has a driving part A, a first driving / driven part B, and a second driving / driven part C inside a hollow cylindrical body 3 with a first hole 4 in the center at the bottom.

[0029] (Driving Part) In the present invention, the driving part A includes: a first base 5, with a first serrated part 6 provided around the first hole 4 in the hollow cylindrical body 3; a second base 7, with a second serrated part 8, and embedded inside the first base 5; and a first connecting rod 9, fixed to the second base 7, and extending through the first hole 4 to the lower part of the engraving device 2.

[0030] The function of the driving part A is to drive the first driving / driven part B to move upward and rotate around the axis by using the force applied externally to the first connecting rod 9 to make the device move upward.

[0031] The first base 5 is cylindrical and fixed to the periphery of the first hole 4 inside the hollow cylinder 3. The outer surface of the first base 5 contacts the inner wall of the hollow cylinder 3, and the bottom surface contacts and is fixed to the upper surface of the bottom surface of the hollow cylinder 3. The first serrated part 6 is disposed on the upper part of the first base 5.

[0032] The second base 7 is fixed to the first connecting rod 9 and moves up and down as the first connecting rod 9 moves in the up and down direction. The first connecting rod 9 is only allowed to move in the up and down direction. The second serrated part 8 has serrations with the same period as the first serrated part 6. When the second base 7 is fully inserted into the first base 5, the first serrated part and the second serrated part are arranged in a staggered period. The staggered period can be appropriately selected, preferably in the range of 0.1 to 0.9 periods. The structure of the serrations is not particularly limited and can be a single-edged structure or a double-edged structure. In the example of FIG3, the serrations of the first serrated part 6 are single-edged structures, and the serrations of the second serrated part 8 are double-edged structures.

[0033] The first connecting rod 9 is configured to be coaxial with the hollow cylinder 3.

[0034] (First driving / driven part) The first driving / driven part B moves upward passively under the drive of the driving part A. The third serrated part 15 provided at the lower part of the third base 10 of the first driving / driven part B rotates coaxially through the rotation generated by the driving part A. The first driving / driven part B transmits its own upward movement and rotation to the second driving / driven part C to drive the second driving / driven part C.

[0035] The first driving / driven part B includes the third base 10. The third base 10 is in the shape of a disk coaxial with the hollow cylinder 3. The first driving / driven part B can move up and down and rotate inside the hollow cylinder 3 while maintaining coaxiality with the hollow cylinder 3. The third base 10 is not connected to the connecting rod.

[0036] The third substrate 10 has a third serrated portion 15 on the side facing the second substrate 7, which engages with the first serrated portion 6 and the second serrated portion 8. The third serrated portion 15 is composed of double teeth, which engage with the serrations of the first serrated portion 6 and the second serrated portion 8, respectively. Among the serrations of the third serrated portion 15, the serrations engaging with the serrations of the first serrated portion 6 and the serrations engaging with the serrations of the second serrated portion 8 are configured such that the third serrated portion 15 does not simultaneously engage with the first serrated portion 6 and the second serrated portion 8. By making the third serrated portion 15 a double tooth of this shape, it is possible to reliably engage with the serrations of the first serrated portion 6 and the second serrated portion 8. Alternatively, the third serrated portion 15 may also be a single tooth.

[0037] The third substrate 10 has a fourth serrated portion 17 on the surface opposite to where the third serrated portion 15 is provided.

[0038] (Second Drive / Driven Part) The second drive / driven part C moves upward passively under the drive of the first drive / driven part B, and rotates coaxially through the rotation generated by the drive of the first drive / driven part B, causing the index body 14 to rotate.

[0039] The second drive / driven part C includes a fourth base 11, a fifth base 19, a cover 12, and a second connecting rod 13. The second connecting rod 13 is integrated with the fourth base 11. The fifth base 19 and the cover 12 have holes in the center for the second connecting rod 13 to pass through, but since they are fixed to the hollow cylinder 3, they will not move.

[0040] The fourth base 11 has a fifth serrated part 20 on the side facing the third base 10, which can engage with the fourth serrated part 17. The fifth base 19 is provided on the opposite side of the fourth base 11. The fifth base 19 has a sixth serrated part 22 on the side opposite to the fourth base 11. When the first connecting rod 9 is not subjected to a force from below, the serrations of the fourth serration 17 and the fifth serration 20 are positioned in a non-interlocking position.

[0041] The cover 12 covers the entire upper part of the hollow cylinder 3. A cylindrical portion 18 protruding in a cylindrical shape is provided at the center of the cover 12. The cover 12 supports the up-and-down movement of the second connecting rod 13 within the cylindrical portion 18. Furthermore, the sixth serration 22 is located within the cylindrical portion 18.

[0042] The second connecting rod 13 coaxially fixes the fourth base 11 to the hollow cylinder 3. The second connecting rod 13 has a cylindrically enlarged head 21 within the cylindrical portion 18. A seventh serration 23 that engages with the sixth serration 22 is provided on the lower side of the head 21. The second connecting rod 13 can move in the up-and-down direction. Furthermore, the second connecting rod 13 and the fourth base 11 can rotate coaxially. The cylindrically enlarged head 21 of the second connecting rod 13 can move up and down within the cylindrical portion 18 of the cover portion 12.

[0043] An indicator body 14 is provided at the top of the head 21. The indicator body 14 is used to indicate specific text or numbers on a dial marked with text or numbers, specifically, it is marked with an arrow or other markings. As shown in FIG3, the indicator body 14 can be integrated with the head 21 of the second connecting rod 13, or as shown in FIG4, it can be installed on the upper side of the head by a connecting means. The connecting means adopts known connecting means such as screws.

[0044] In the engraving device 2 of the present invention, a first force-applying means 24 is provided between the upper side of the third base 10 and the lower side of the fifth base 19, and a second force-applying means 25 is provided between the upper side of the fourth base 11 and the lower side of the fifth base 19. The force-applying means can adopt known means, such as a spring.

[0045] The operation of the engraving device of the present invention will be described below with reference to FIG5 to 10. In this series of actions, we will take the case where the third serration has two teeth as an example, but even if it has only one tooth, the basic actions are the same.Instruction manual, pages 5 / 9, CN 121127356 A

[0046] (Step 1) FIG5 is a schematic diagram illustrating the state before use of the marking device of the present invention (Step 1). In FIG5, the serrations of the first serration portion 6 are engaged with the serrations of the third serration portion 15. The serrations of the second serration portion 8 and the serrations 15' of the third serration portion are not engaged, and are respectively arranged in a manner that is periodically staggered from the serrations of the first serration portion 6. The fourth serration portion 17 and the fifth serration portion 20 are arranged in a manner that is periodically staggered from each other. The amount of staggering of these periods can be appropriately selected, preferably in the range of 0.1 to 0.9 periods. The sixth serration portion 22 and the seventh serration portion 23 are in an engaged state.

[0047] (Step 2) FIG6 is a schematic diagram illustrating the state in which the drive portion A starts to drive and begins to apply an upward force to the first connecting rod 9. In Figure 6, as the drive unit A moves upward, the serrations of the first serration 6 disengage from the serrations of the third serration 15. As the drive unit A moves upward, the serrations of the second serration 8 come into contact with the serration 15' of the third serration. When the drive unit A moves further upward, the serrations of the second serration 8 engage with the serration 15' of the third serration, and through this engagement, the first drive / driven unit B rotates. Through this rotation, the third base 10 and the fourth serration 17 also rotate. Through this rotation, as shown in Figure 6, the fourth serration 17 moves to a position where its inclined portion 17' is opposite to the inclined portion 20' of the fifth serration 20.

[0048] When the third serration 15 is a single tooth, when the first connecting rod 9 is not subjected to a force from below, the serrations of the third serration 15 engage with the serrations of the first serration 6. When a downward force is applied to the first connecting rod 9, the first sawtooth portion 6 and the second sawtooth portion 8 contact the third sawtooth portion 15. When a further downward force is applied to the first connecting rod 9 to move it upward, the third sawtooth portion 15 rotates and engages with the second sawtooth portion 8. Through this engagement, the first drive / driven portion B rotates. Afterward, the operation of the first drive / driven portion B is the same as in the case of the double tooth.

[0049] (Step 3) FIG7 is a schematic diagram illustrating the state of applying a further upward force to the drive portion A. As shown in FIG7, when the second connecting rod 13 moves further upward, the inclined portion of the sawtooth of the fourth sawtooth portion 17 contacts the inclined portion of the sawtooth of the fifth sawtooth portion 20. At this time, the second connecting rod 13 begins to rise, and the tip of the sawtooth of the sixth sawtooth portion 22 is in contact with the tip of the sawtooth of the seventh sawtooth portion.

[0050] (Step 4) In the state shown in FIG7, when the first connecting rod 9 of the drive unit A moves further upward, the first drive / driven unit B and the second drive / driven unit C continue to rise.At this time, the inclined portion of the saw teeth of the fourth saw tooth section 17 rises in contact with the inclined portion of the saw teeth of the fifth saw tooth section 20. When the first drive / driven part B rises further, as shown in FIG8, the saw teeth of the fifth saw tooth section 20 slide off the inclined portion of the saw teeth of the fourth saw tooth section 17. The fourth saw tooth section 17 and the fifth saw tooth section 20 have grooves 26 and 27 between their respective saw teeth. The saw teeth of the fourth saw tooth section 17 and the saw teeth of the fifth saw tooth section 20 mesh in the grooves 26 and 27. The number of saw teeth in the fourth saw tooth section 17 and the number of saw teeth in the fifth saw tooth section 20 are half the number of saw teeth in the third saw tooth section. On the other hand, the grooves 26 and 27 provided between the serrations of the fourth serration portion 17 and the fifth serration portion 20 are distributed on the surfaces of the third base 10 and the fifth base 11 in the same number and at equal intervals as the serrations of the fourth serration portion 17 and the fifth serration portion 20. Therefore, the second connecting rod 13 will rotate by engaging with the grooves 26 and 27, and the rotation angle is equivalent to half of the cycle corresponding to the serration of the fifth serration portion 20 (that is, equivalent to the cycle corresponding to the serration of the third serration portion). Through these actions, the second connecting rod 13 rotates one cycle.

[0051] Through the operations of steps 3 and 4 above, the seventh serration portion 23 rotates one cycle. Through this rotation, the index body 14 can be rotated one cycle. To make the indicator body 14 rotate one cycle, the number of serrations in the first serration 6, the second serration 8, the third serration 15, the sixth serration 22, and the seventh serration 23 should be twice the number of serrations in the fourth serration 17 and the fifth serration 20. For example, as shown in Figure 2, when the dial is marked with numbers 0 to 9, since only 36° needs to be rotated in one operation, the number of serrations in the first serration 6, the second serration 8, the third serration 15, the sixth serration 22, and the seventh serration 23 should be 10, and the number of serrations in the fourth serration 17 and the fifth serration 20 should be 5.

[0052] (Step 5) Figure 9 is a schematic diagram illustrating the state in which the force that causes the drive unit A to move upward is released. When the force that causes the first connecting rod 9 to move upward is released, the drive unit A moves downward. Since the force that caused the first driving / driven part B to move upward is also released, the first driving / driven part B also moves downward. As a result, the fourth serrated part 17 and the fifth serrated part 20 disengage.

[0053] (Step 6) FIG10 is a schematic diagram for illustrating the state at the end of the operation. The first connecting rod 9 and the second base 7 have completely descended to the bottom.The second substrate 7 is inserted into the inner side of the first substrate 5. The serrations of the third serration 15 mesh with the serrations of the first serration 6. As a result, the first drive / driven part B is reliably rotated and reset, and the operation ends.

[0054] In order to adjust the index body 14 to the desired position, repeat the above steps 1 to 6.

[0055] In this specification, the offset between serrations with the same period is 0.1 to 0.9 periods. The offset of the period can be appropriately selected within this range.

[0056] In the engraving device of the present invention, a first force-applying means 24 and a second force-applying means 25 are provided. The first force-applying means 24 is provided between the third substrate 10 and the fifth substrate 19. The second force-applying means 25 is provided between the fourth substrate 11 and the fifth substrate 19. During the operation process of Figures 6 to 8 above, the first force-applying means 24 is in an extended state and the second force-applying means 25 is in a compressed state. When the upward force applied to the first connecting rod is released, the first force-applying means 24 and the second force-applying means 25 return to their original states, thereby causing the fifth serrated portion 20 to quickly separate from the fourth serrated portion 17.

[0057] Second Embodiment In the second embodiment, compared with the first embodiment, the driving part and the first driving / driven part are the same, but the second driving / driven part is different. The differences will only be described below.

[0058] The second driving / driven part C of the second embodiment includes: a fourth base 11, which is provided with a fifth serrated portion 20 that engages with the fourth serrated portion 17; a second connecting rod 13, which is connected to the base 11 and is provided with a cylindrically enlarged head 21. An index body 14 is provided on the upper side of the head 21.

[0059] The second embodiment is a simplified version of the first embodiment. In this embodiment, the fifth base 19, the cover 12, the sixth serrated portion 22, and the seventh serrated portion 23 are not present. An index body 14 is provided at the top of the head 21 of the second connecting rod 13.

[0060] As shown in FIG4, the fourth sawtooth portion 17 and the fifth sawtooth portion 20 have grooves 26 and 27 between their respective sawtooths. Thus, the index body 14 can rotate one cycle.

[0061] (Step 1) and (Step 2) are the same as described above.

[0062] (Step 3') As the first connecting rod 9 moves further upward, the drive portion A also moves upward. Since the sawtooth of the second sawtooth portion 8 meshes with the sawtooth of the third sawtooth portion 15, the first drive / driven portion B also moves upward.When the first driving / driven part B moves further upward, the inclined portion of the saw teeth of the fourth saw tooth part 17 contacts the inclined portion of the saw teeth of the fifth saw tooth part 20 (see page 7 / 9 of the specification, CN 121127356 A), thereby causing the second connecting rod 13 to move upward.

[0063] (Step 4') When the first connecting rod 9 of the driving part A moves further upward, the first driving / driven part B and the second driving / driven part C continue to rise. At this time, the inclined portion of the saw teeth of the fourth saw tooth part 17 rises in contact with the inclined portion of the saw teeth of the fifth saw tooth part 20. When the first driving / driven part B rises further, the saw teeth of the fifth saw tooth part 20 slide off the inclined portion of the saw teeth of the fourth saw tooth part 17, and the saw teeth of the fourth saw tooth part 17 and the saw teeth of the fifth saw tooth part 20 fall into each other's grooves and engage. Through these actions, the second connecting rod 13 rotates one cycle, thereby causing the indicator body to rotate one cycle as well.

[0064] (Step 5') When the force that causes the first connecting rod 9 to move upward is released, the drive unit A moves downward. Since the force that causes the first drive / driven unit B to move upward is also released, the first drive / driven unit B also moves downward. As a result, the fourth serrated part 17 disengages from the fifth serrated part 20.

[0065] (Step 6') The first connecting rod 9 and the second base 7 descend completely to the bottom. The second base 7 is inserted into the inside of the first base 5. The serrations of the third serrated part engage with the serrations of the first serrated part. As a result, the drive unit A is reliably reset, and the operation ends.

[0066] Industrial Applicability The present invention can reliably change the display of the indicator body in an engraving device used in an injection molding machine for engraving a manufacturing number or manufacturing date on the surface of a molded article.

[0067] Symbol Explanation 1 Mold substrate 2 Engraving device 3 Hollow cylinder 4 First hole 5 First base 6 First serrated part 7 Second base 8 Second serrated part 9 First connecting rod 10 Third base 11 Fourth base 12 Cover 13 Second connecting rod 14 Index body 15 Third serrated part 17 Fourth serrated part 18 Cylindrical part 19 Fifth base 20 Fifth serrated part (Instruction manual page 8 / 9) 10 CN 121127356 A 21 Head 22 Sixth serrated part 23 Seventh serrated part 24 First force application means 25 Second force application means 26, 27 Groove 28 Display panel A Driving part B First driving / driven part C Second driving / driven part (Instruction manual page 9 / 9) 11 CN 121127356 A Figure 1 (Instruction manual drawing 1 / 10) 12 CN 121127356 A Figure 2 (Instruction manual drawing 2 / 10) 13 CN 121127356 A Figure 3 Appendix 3 of the instruction manual / Page 10 14 CN 121127356 A Figure 4 Appendix 4 of the instruction manual / Page 10 15 CN 121127356 A Figure 5 Appendix 5 of the instruction manual / Page 10 16 CN 121127356 A Figure 6 Appendix 6 of the instruction manual / Page 10 17 CN 121127356 A Figure 7 Appendix 7 of the instruction manual / Page 10 18 CN 121127356 A Figure 8 Appendix 8 of the instruction manual / Page 10 19 CN 121127356 A Figure 9 Appendix 9 of the instruction manual / Page 10 20 CN 121127356 A Figure 10 Appendix 10 of the instruction manual / Page 10 21 CN 121127356 A.

Claims

1. An engraving device, embedded in a recess of a molding die, characterized in that, The engraving device includes: A hollow cylindrical body with a first hole in the center of its bottom; The driving unit includes: a first base having a first serrated portion around the periphery of the first hole in the hollow cylinder; a second base having a second serrated portion embedded inside the first base; and a first connecting rod fixed to the second base and extending through the first hole to the lower part of the engraving device. The first driving / driven part includes a third base, on which a third sawtooth part is provided that meshes with the first sawtooth part and the second sawtooth part, and a fourth sawtooth part is provided on a surface opposite to the surface on which the third sawtooth part is provided. The second drive / driven part includes a fourth base and a second connecting rod. The fourth base is provided with a fifth serrated part that meshes with the fourth serrated part. The second connecting rod is connected to the fourth base and is provided with a cylindrical enlarged head. An indicator is provided on the upper side of the head.

2. The engraving apparatus according to claim 1, characterized in that, The second drive / driven part also includes: A cover portion, which is disposed on the upper part of the hollow cylinder and has a cylindrical portion that protrudes in a cylindrical shape in the center; The fifth base is located below the cover and is fixed to the hollow cylinder. A sixth serrated part is provided on its upper surface. The second connecting rod passes through the cover and the fifth base; The second connecting rod has a seventh sawtooth portion on the lower side of the head that meshes with the sixth sawtooth portion.

3. The engraving apparatus according to claim 1, characterized in that: The first serrated portion and the second serrated portion have serrations with the same period. When the second substrate is embedded in the first substrate, the serrations of the first serrated portion and the serrations of the second serrated portion are arranged in a staggered period, and the third serrated portion meshes with the first serrated portion.

4. The engraving apparatus according to claim 3, characterized in that: The periodic offset between the serrations of the first serration portion and the serrations of the second serration portion is 0.1 to 0.9 cycles.

5. The engraving apparatus according to claim 1, characterized in that: The third serrated section is a single tooth or a double tooth.

6. The engraving apparatus according to claim 1, characterized in that: A first force-applying means is provided between the third substrate and the fifth substrate, and a second force-applying means is provided between the fourth substrate and the fifth substrate.

7. The engraving apparatus according to claim 1, characterized in that: The indicator body is mounted on the upper side of the head via a connection means.

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