Mute pressing stationery

Abstract

The utility model discloses mute pressing stationery which comprises an end cover, a telescopic piece, a pressing piece, an elastic piece, a lower shell and a replacement core assembly, a press fit sleeve with a downward opening is arranged in a key, and the upper portion of the telescopic piece is located in the press fit sleeve; an upper channel section, a first annular step surface, a second annular step surface and a lower channel section are sequentially arranged in the first channel from top to bottom, a plurality of driving columns, a plurality of adjusting columns and a plurality of clamping columns are sequentially arranged on the outer wall of the telescopic part from top to bottom, and a clamping groove and a second guide inclined plane are arranged on the lower side edge of the stop block; when the upper end of the clamping column is clamped with the clamping groove, the telescopic piece extends out to be locked, and the adjusting column is located in an annular area defined by the arc-shaped pieces; the upper end of the clamping column is in running fit with the second guide slope, the telescopic piece retracts and is stored when the clamping column is located in the strip-shaped notch, and the adjusting column is located in the upper channel section. According to the mute pressing stationery, noise generated by jumping contact in the rotating process can be effectively reduced, and the influence of noise pollution on the surrounding environment and other people is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stationery technical field, concretely relates to a mute press stationery. BACKGROUND

[0002] At present, the stationery that can be pressed and stored includes correction tape, adhesive tape or automatic ball-point pen and the like. For example, the utility model patent (the authorized announcement day is March 15, 2023, and the authorized announcement number is CN220594494U) applied by the applicant discloses a telescopic self-locking mechanism and stationery containing the telescopic self-locking mechanism, comprising: an end cover 1, a telescopic part 2, an elastic part 3 and a pressing part 4, wherein the telescopic part 2 includes a pressing part 21, a driving part 22 and a locking part 23, a second guide strip 2231 is arranged on the outer wall of the lower connecting rod 223 of the driving part 22, a second guide groove 233 is arranged on the inner wall of the locking part 23, the second guide strip 2231 is in the second guide groove 233 and can slide relatively, and the locking part 23 and the driving part 22 are synchronously rotated through the limiting of the second guide strip 2231 and the second guide groove 233. The composition components of such telescopic part are more, each component has specific structure requirement, the structure is more complex, and the manufacturing complexity and cost are increased, especially the sliding connection between the driving part 22 and the locking part 23 needs accurate machining and assembly, which further improves the machining cost.

[0003] In addition, each locking block 232 of the locking part 23 is below the corresponding clamping groove 116, the driving part 22 is rotated and moved under the action of the elastic part 3 and under the action of the pressing cooperation tooth 2212 and the pressing sawtooth 212, in the rotating process, the locking block 232 and the clamping groove 116 abut and cooperate, and such structure brings noise problem to the stationery of telescopic self-locking mechanism in use, the pressing sawtooth 212 jumps on the pressing cooperation tooth 2212 when being pressed and rotated, and noise can be generated, which still has certain influence on others for the environment with special requirement of quietness, such as examination or listening to class and the like. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a mute pressing stationery, which can effectively reduce noise generated by jumping contact in the rotating process and reduce the influence of noise pollution on the surrounding environment and others.

[0005] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0006] A mute pressing stationery, comprising:

[0007] An end cover is provided with a first channel, the first channel has a driving part and a locking part, and the driving part and the locking part are combined or separated;

[0008] The telescopic member is movably arranged in the first channel and has a driving block capable of being acted on by the driving part to generate driving force;

[0009] The pressing member comprises a key and a sliding bracket, the key is sleeved on the top of the end cover, the lower end of the key penetrates through the end cover and is fixedly connected with the sliding bracket through buckling; the key is located at the upper end of the first channel, the sliding bracket is provided with a limiting baffle abutting against the lower end surface of the first channel, and the telescopic member is located between the key and the limiting baffle to be movably adjusted or pre-pressed;

[0010] The elastic member is used for applying force to the telescopic member;

[0011] The lower shell is connected with the end cover, and the sliding bracket is located in the lower shell;

[0012] The replacement core assembly is arranged in the sliding bracket, and the sliding bracket and the replacement core assembly are synchronously linked and can be movably telescoped in the lower shell;

[0013] Characterized in that the elastic member is sleeved on the telescopic member and pre-pressed between the key and the end cover;

[0014] The outer wall of the telescopic member is sequentially provided with a plurality of driving columns, a plurality of adjusting columns and a plurality of clamping columns from top to bottom, the driving columns, the adjusting columns and the clamping columns are annularly and equally distributed, each driving column constitutes the driving block, the driving column generates driving force through the action of the key and is linked with the locking part, the adjusting column is located in the locking part to be movably adjusted, and the telescopic member can be telescopically locked with the locking part through the clamping column.

[0015] In the preferred solution, the key is internally provided with a pressing sleeve with an opening downward, the upper part of the telescopic member is located in the pressing sleeve, and the elastic member is pre-pressed between the pressing sleeve and the end cover.

[0016] In the further preferred solution, the first channel is sequentially provided with an upper channel section, a first annular stepped surface, a second annular stepped surface and a lower channel section from top to bottom, the second annular stepped surface is provided with a plurality of annularly and equally distributed guide blocks, each guide block constitutes the driving part, each guide block is provided with a first guide inclined surface, each driving column is located between the lower end surface of the opening of the pressing sleeve and the second annular stepped surface and constitutes the driving block, and the lower end of each driving column is rotationally connected with each first guide inclined surface.

[0017] In the still further preferred solution, the inner wall of the lower channel section is provided with a plurality of annularly and equally distributed arc-shaped pieces, a strip-shaped gap is formed between adjacent two arc-shaped pieces; the lower side edge of each arc-shaped piece is provided with a blocking block clamped with each clamping column, and the strip-shaped gap and the blocking block jointly constitute the locking part.

[0018] In a further preferred solution, the lower side of the blocking block is provided with a clamping groove and a second guide slope; the upper end of the clamping column is engaged with the clamping groove to make the telescopic member extend and lock, the adjusting column is located in the annular area surrounded by the arc-shaped pieces; the upper end of the clamping column is rotationally engaged with the second guide slope, and when the clamping column is located in the strip-shaped gap, the telescopic member is retracted and stored, and the adjusting column is located in the upper passage segment.

[0019] In a further preferred solution, the lower end of the pressing sleeve is provided with a limiting ring on the outer wall of the opening, and the elastic member is a compression spring, which is sleeved on the telescopic member and is pre-pressed between the limiting ring and the first annular stepped surface. The upper end of the compression spring is in contact with the limiting ring, and the lower end of the compression spring is in contact with the first annular stepped surface.

[0020] In a further preferred solution, the limiting ring is composed of a plurality of limiting blocks that are annularly and equally distributed.

[0021] In a further preferred solution, the inner diameter of the upper passage segment is greater than the inner diameter of the first annular stepped surface, the inner diameter of the first annular stepped surface is greater than the inner diameter of the second annular stepped surface, and the inner diameter of the second annular stepped surface is equal to the inner diameter of the lower passage segment; correspondingly, the driving column, the adjusting column, and the clamping column are on the same axis; the width of the driving column is greater than the width of the clamping column, and the width of the clamping column is greater than the width of the adjusting column. The width of the driving column is greater than the width of the clamping column, and the width of the clamping column is greater than the width of the adjusting column, because the driving column is arranged between the opening lower end surface of the pressing sleeve and the second annular stepped surface, and a driving column with a larger width can be in abutting engagement with the opening lower end surface of the pressing sleeve and the second annular stepped surface for limiting in different states, and can be in engagement with the first guide slope on the second annular stepped surface to realize the up-down movement and rotation of the telescopic member at a certain height. The main function of the clamping column is to cooperate with the clamping groove and the second guide slope of the blocking block to realize the locking and unlocking functions. The width of the clamping column is smaller than the width of the driving column but larger than the width of the adjusting column, which can make each clamping column smoothly enter the strip-shaped gap in the inner wall of the lower passage segment, ensure that the clamping column accurately enters or exits the clamping groove and the second guide slope, and avoid interference due to excessive width or insecure clamping due to insufficient width. The smaller width of the adjusting column is between the driving column and the clamping column, and is mainly used to make the adjusting column freely pass through each part of the first passage in different states, so that it can freely adjust the position during the state conversion process and will not hinder the movement of other components.

[0022] In a preferred solution, the limiting stopper is provided with a limiting column, and the lower end surface of the telescopic member is provided with a limiting slot with a downward notch, and the limiting column is located in the limiting slot. The cooperation of the limiting column and the limiting slot can correct the telescopic member, avoiding eccentricity of the telescopic member during pressing process to cause functional failure.

[0023] In the preferred embodiment, the sliding support is fixedly connected to the lower shell by a buckle. Generally, the side wall of the lower shell is provided with a strip-shaped guide groove, and the sliding support is provided with a sliding block corresponding to the strip-shaped guide groove, which slides in the strip-shaped guide groove and is limited.

[0024] When the elastic member is in the contracted state and the key is not pressed by external force, the elastic member is in the compressed state between the press-fit sleeve and the first annular step surface; each clamping column of the telescopic member is limited in the corresponding strip-shaped gap, so that the telescopic member cannot rotate; each driving column is in the highest position, and the upper end of each driving column abuts against the lower end surface of the opening of the press-fit sleeve; under the action of the elastic member, the telescopic member has a tendency to rotate upward; the lower end surface of the first channel abuts against the limiting baffle of the sliding support, so that the sliding support and the key cannot move upward; under the action of the elastic member, the press-fit sleeve of the key abuts against the upper end of each driving column to press the key, so that the limiting baffle of the sliding support also presses the lower end surface of the first channel. The telescopic member, the key and the end cover interact and press each other under the action of the elastic member to reach a balanced, stable and non-loose state.

[0025] When the telescopic member needs to be extended and locked, in the contracted state, the key is pressed by external force and the telescopic member moves downward, and the elastic member is further compressed; during the downward movement, the lower end of each driving column of the telescopic member slides downward along the corresponding first guide slope to between two adjacent first guide slopes (i.e. on the first annular step surface), and the upper end of each clamping column moves downward to the lowest point of the blocking block and rotates, so that the upper end of each clamping column passes over the lowest point of the blocking block and then enters the clamping groove, so that the upper end of each clamping column is pressed against the clamping groove; when the upper end of each clamping column enters the clamping groove, the telescopic member immediately moves upward and rotates under the action of the elastic member, so that the lower end of each driving column directly passes over the highest point of the corresponding guide block without contacting the highest point of the guide block; each adjusting column is located in the annular region surrounded by the arc-shaped pieces. The telescopic member, the key and the end cover interact and press each other under the action of the elastic member to reach a balanced, stable and non-loose state, i.e. an extended and locked state.

[0026] When the telescopic member is in the extended and locked state, the key is pressed by external force again and the telescopic member moves downward, and the elastic member is compressed; during the downward movement, the lower end of each driving column of the telescopic member slides downward along the corresponding first guide slope to between two adjacent first guide slopes (i.e. on the first annular step surface), and each clamping column also moves downward; when the upper end of each clamping column just leaves the clamping groove, the upper end of each clamping column is below the lowest point of the corresponding second guide slope; the telescopic member rotates under the action of the elastic member, the upper end of each clamping column moves upward along the corresponding second guide slope, so that each clamping column enters the corresponding strip-shaped gap for limiting, and at the same time, each driving column moves upward, and the lower end of each driving column directly passes over the highest point of the corresponding guide block without contacting the highest point of the guide block; each adjusting column is located in the upper channel segment. The telescopic member is switched from the extended and locked state to the contracted state.

[0027] Generally, according to the use needs, the user drives the replacement core assembly to switch the nozzle between the telescopic states by cyclically pressing the key or directly pressing the replacement core assembly shell part of the lower shell, so as to realize the use and storage functions.

[0028] The connection structure of the sliding support and the key can adopt the specific structure in the utility model patent for a telescopic self-locking mechanism and stationery containing the telescopic self-locking mechanism, which is disclosed in the authorization announcement date of March 15, 2023 and the authorization announcement number of CN220594494U.

[0029] The connection structure of the lower shell and the end cover can adopt the specific structure in the utility model patent for a pulling and replacing mechanism and stationery containing the pulling and replacing mechanism, which is disclosed in the authorization announcement date of July 4, 2023 and the authorization announcement number of CN219295085U.

[0030] Compared with the prior art, the utility model has the following advantages:

[0031] (1) The utility model integrates the original pressing part, driving part and locking part into a telescopic part made in one piece, and realizes the driving and locking functions through a plurality of annular step surfaces and guide blocks, arc-shaped pieces and other components arranged in the first channel, which not only reduces the number of parts and the assembly difficulty, but also makes the structure of the push stationery more compact and reliable.

[0032] (2) The elastic part of the utility model acts between the pressing sleeve of the key and the end cover, which is different from the traditional elastic part acting between the telescopic part and the end cover. Under the action of the elastic part, the telescopic part directly passes over the highest point of the corresponding guide block during the upward rotation, without contacting the highest point of the guide block, which can effectively reduce the noise generated during the rotation of the traditional push fitting teeth and the push sawtooth, and reduce the influence of noise pollution on the surrounding environment and others. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure schematic view of the telescopic part in the contracted state in the embodiment of the utility model;

[0034] Figure 2 is a disassembled state structure schematic view of each component of the mute push stationery;

[0035] Figure 3 is Figure 2 the cross-sectional view of the end cover, the telescopic part, the elastic part and the key in the embodiment of the utility model;

[0036] Figure 4 is Figure 2 a structure schematic view of the telescopic part in the embodiment of the utility model;

[0037] Figure 5 is Figure 4 a structure schematic view (top view) of the telescopic part in the utility model;

[0038] Figure 6 is Figure 2 a top view of the end cover in the utility model;

[0039] Figure 7 is Figure 2 a bottom view of the end cover in the utility model;

[0040] Figure 8 is Figure 2 a sectional view of the end cover in the utility model;

[0041] Figure 9 is Figure 2 a sectional view of the end cover in the utility model (another angle);

[0042] Figure 10 is a structure schematic view of the telescopic part in the utility model in an external force pressing state. DETAILED DESCRIPTION

[0043] The utility model will be specifically described below in combination with the drawings and specific embodiments.

[0044] As Figures 1-10 shown, the mute pressing stationery in the embodiment comprises:

[0045] an end cover 1 provided with a first channel 11, the first channel 11 having a driving part 111 and a locking part 112, the driving part 111 and the locking part 112 being combined or separated;

[0046] a telescopic part 2 movably arranged in the first channel 11 and provided with a driving block 21 capable of driving the driving part 111;

[0047] a pressing part 3 comprising a key 31 and a sliding bracket 32, the key 31 being sleeved on the top of the end cover 1, the lower end of the key 31 penetrating through the end cover 1 and being fixedly connected with the sliding bracket 32 through buckling, the key 31 being located at the upper end of the first channel 11, the sliding bracket 32 being provided with a limiting baffle 321 abutting against the lower end face of the first channel 11, and the telescopic part 2 being located between the key 31 and the limiting baffle 321 for movable adjustment or pre-pressing;

[0048] a resilient part 4 for applying force to the telescopic part 2;

[0049] a lower shell 5 connected with the end cover 1, and the sliding bracket 32 being located in the lower shell 5;

[0050] a replacement core assembly 6 arranged in the sliding bracket 32, the sliding bracket 32 and the replacement core assembly 6 being synchronously linked and capable of being movably telescoped in the lower shell 5;

[0051] The elastic member 4 is sleeved on the telescopic member 2 and is pre-pressed between the key 31 and the end cover 1;

[0052] The outer wall of the telescopic member 2 is sequentially provided with a plurality of driving columns 22, a plurality of adjusting columns 23 and a plurality of clamping columns 24 from top to bottom, the driving columns 22, the adjusting columns 23 and the clamping columns 24 are annularly and equally distributed, each driving column 22 constitutes the driving block 21, the driving column 22 generates driving force by acting on the key 31 and is linked with the locking part 112, the adjusting column 23 is in the locking part 112 to be adjusted, and the telescopic member 2 can be telescopically locked with the locking part 112 through the clamping column 22.

[0053] The key 31 is internally provided with a pressing sleeve 311 with an opening downward, and the upper part of the telescopic member 2 is in the pressing sleeve 311; the elastic member 4 is pre-pressed between the pressing sleeve 311 and the end cover 1.

[0054] The first channel 11 is sequentially provided with an upper channel section 113, a first annular step surface 114, a second annular step surface 115 and a lower channel section 116 from top to bottom, the second annular step surface 115 is provided with a plurality of annularly and equally distributed guide blocks 117, each guide block 117 constitutes the driving part 111, each guide block 117 is provided with a first guide inclined surface 118, each driving column 22 is between the lower end surface of the opening of the pressing sleeve 311 and the second annular step surface 115 and constitutes the driving block 21, and the lower end of each driving column 22 is rotationally connected with each first guide inclined surface 118.

[0055] The inner wall of the lower channel section 116 is further provided with a plurality of annularly and equally distributed arc-shaped pieces 1161, and a strip-shaped gap 1162 is formed between adjacent two arc-shaped pieces 1161; the lower side edge of each arc-shaped piece 1161 is provided with a blocking block 1163 which is clamped with each clamping column 24, and the strip-shaped gap 1162 and the blocking block 1163 jointly constitute the locking part 112.

[0056] The lower side edge of the blocking block 1163 is provided with a clamping groove 1164 and a second guide inclined surface 1165; when the upper end of the clamping column 24 is clamped with the clamping groove 1164, the telescopic member 2 is extended and locked, and the adjusting column 23 is in the annular area surrounded by the arc-shaped pieces 1161; the upper end of the clamping column 24 is rotationally connected with the second guide inclined surface 1165, and when the clamping column 24 is in the strip-shaped gap 1162, the telescopic member 2 is retracted and stored, and the adjusting column 23 is in the upper channel section 113.

[0057] The inner diameter of the upper channel segment 113 is greater than the inner diameter of the first annular step surface 114, the inner diameter of the first annular step surface 114 is greater than the inner diameter of the second annular step surface 115, and the inner diameter of the second annular step surface 115 is equal to the inner diameter of the lower channel segment 116; the driving column 22, the adjusting column 23, and the clamping column 24 are on the same axis; the width of the driving column 22 is greater than the width of the clamping column 24, and the width of the clamping column 24 is greater than the width of the adjusting column 23. The width of the driving column 22 is greater than the width of the clamping column 24, and the width of the clamping column 24 is greater than the width of the adjusting column 23, because the driving column 22 is arranged between the open lower end surface of the compression sleeve 311 and the second annular step surface 115, and the driving column 22 with a larger width can be in abutting cooperation with the open lower end surface of the compression sleeve 311 and the second annular step surface 115 for limiting in different states, and can cooperate with the first guide inclined surface 118 on the second annular step surface 115 to realize the up-down movement and rotation of the telescopic part at a certain height. The main function of the clamping column 24 is to cooperate with the clamping groove 1164 and the second guide inclined surface 1165 of the blocking block 1163 to realize the locking and unlocking functions. The width of the clamping column 24 is smaller than the width of the driving column 22 but greater than the width of the adjusting column 23, which can make each clamping column 24 smoothly enter the strip-shaped gap 1162 in the inner wall of the lower channel segment 116, ensure that the clamping column 24 accurately enters or leaves the clamping groove 1164 and the second guide inclined surface 1165, and avoid interference due to excessive width or insecure clamping due to insufficient width. The smaller width of the adjusting column 23 is between the driving column 22 and the clamping column 24, which is mainly used to make the adjusting column 23 freely pass through each part of the first channel 11 in different states, so that it can freely adjust the position during the state conversion process and will not hinder the movement of other components.

[0058] When the elastic member 4 is in the contracted state and the button 31 is not pressed by external force, the elastic member 4 is in the compressed state between the compression sleeve 311 and the first annular step surface 114; each clamping column 24 of the telescopic part 2 is limited in the corresponding strip-shaped gap 1162, so that the telescopic part 2 cannot be rotated; each driving column 22 is in the highest position, and the upper end of each driving column 22 abuts against the open lower end surface of the compression sleeve 311; under the action of the elastic member 4, the telescopic part 2 has a tendency to rotate upward; the lower end surface of the first channel 11 abuts against the limiting baffle 321 of the sliding support 32, and the sliding support 32 and the button 31 are limited and cannot move upward; under the action of the elastic member 4, the compression sleeve 311 of the button 31 presses against the upper end of each driving column 22 to press the button 31, so that the limiting baffle 321 of the sliding support 32 also presses against the lower end surface of the first channel 11. The telescopic part 2, the button 31, and the end cover 1 interact and press against each other under the action of the elastic member 4 to reach a balanced, stable, and non-loose state.

[0059] When the telescopic part 2 needs to be extended and locked, in the retracted state, an external force acts on the button 31 and drives the telescopic part 2 to move downward, and the elastic member 4 is further compressed; during the downward movement, the lower end of each drive column 22 of the telescopic part 2 slides downward along the corresponding first guide slope 118 to between the adjacent two first guide slopes 118 (i.e. on the first annular stepped surface 114), and the upper end of each clamping column 24 moves downward to the lowest point of the blocking block 1163 and rotates, so that the upper end of each clamping column 24 passes over the lowest point of the blocking block 1163 and then enters the clamping groove 1164, and the upper end of each clamping column 24 is locked in abutment with the clamping groove 1164; when the upper end of each clamping column 24 enters the clamping groove 1164, the telescopic part 2 immediately moves upward and rotates under the action of the elastic member 4, so that the lower end of each drive column 22 directly passes over the highest point of the corresponding guide block 117 without contacting the highest point of the guide block 117; and each adjusting column 23 is located in the annular region surrounded by the arc-shaped pieces 1161. The telescopic part 2, the button 31 and the end cover 1 interact with each other under the action of the elastic member 4, and are in abutment to achieve a balanced, stable and non-loose state, i.e. an extended and locked state.

[0060] When the telescopic part 2 is in the extended and locked state, an external force again acts on the button 31 and drives the telescopic part 2 to move downward, and the elastic member 4 is compressed; during the downward movement, the lower end of each drive column 22 of the telescopic part 2 slides downward along the corresponding first guide slope 118 to between the adjacent two first guide slopes 118 (i.e. on the first annular stepped surface 114), and each clamping column 24 also moves downward; when the upper end of each clamping column 24 just leaves the clamping groove 1164, the upper end of each clamping column 24 is below the lowest point of the corresponding second guide slope 1165, the telescopic part 2 rotates under the action of the elastic member 4, the upper end of each clamping column 24 moves upward along the corresponding second guide slope 1165, each clamping column 24 enters the corresponding strip-shaped gap 1162 for limiting, and each drive column 22 moves upward, the lower end of each drive column 22 directly passes over the highest point of the corresponding guide block 117 without contacting the highest point of the guide block 117; and each adjusting column 23 is located in the upper passage section 113. The telescopic part 2 is switched from the extended and locked state to the retracted state.

[0061] Generally, according to the use needs, the user presses the button 31 or directly presses the replacement cartridge assembly housing portion of the lower shell 5 to drive the replacement cartridge assembly to switch the nozzle between the telescopic states, so as to realize the use and storage functions.

[0062] The lower end opening outer wall of the press-fit sleeve 311 is provided with a limiting ring 312, the elastic member 4 is a compression spring, the compression spring is sleeved on the telescopic part 2 and is pre-compressed between the limiting ring 312 and the first annular stepped surface 114. The upper end of the compression spring is in contact with the limiting ring 312, and the lower end of the compression spring is in contact with the first annular stepped surface 114.

[0063] The limiting ring 312 is composed of a plurality of limiting blocks distributed in a ring shape.

[0064] The limiting block 321 is provided with a limiting column 322, and the lower end surface of the telescopic part 2 is provided with a limiting groove 25 with a notch downward, and the limiting column 322 is located in the limiting groove 25. The cooperation of the limiting column 322 and the limiting groove 25 can correct the telescopic part 2, and avoid the eccentricity of the telescopic part 2 during pressing to cause functional failure.

[0065] The connection structure of the sliding support 32 and the key 31 can adopt the specific structure in the utility model patent with the authorization announcement date of March 15, 2023 and the authorization announcement number of CN220594494U, which is a telescopic self-locking mechanism and stationery containing the telescopic self-locking mechanism.

[0066] The connection structure of the lower shell 5 and the end cover 1 can adopt the specific structure in the utility model patent with the authorization announcement date of July 4, 2023 and the authorization announcement number of CN219295085U, which is a pulling and replacing mechanism and stationery containing the pulling and replacing mechanism.

[0067] In addition, it should be noted that the specific embodiments described in the specification can have different names and the like, and any equivalent or simple changes made according to the structure, features and principles of the utility model patent concept are included in the protection scope of the utility model patent. The skilled in the art of the utility model can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, and they should belong to the protection scope of the utility model.

Claims

1. A mute push stationery, comprising: an end cover, provided with a first channel, the first channel having a driving part and a locking part, the driving part and the locking part being combined or separated; a telescopic part, movably arranged in the first channel, having a driving block capable of acting on the driving part to generate driving; a push part, comprising a push button and a sliding support, the push button being sleeved on the top of the end cover, the lower end of the push button penetrating through the end cover and being fixedly connected with the sliding support by buckling; the push button being located at the upper end of the first channel, the sliding support being provided with a limiting baffle abutting against the lower end surface of the first channel, the telescopic part being located between the push button and the limiting baffle to be movably adjusted or pre-pressed; a resilient part, for applying force to the telescopic part; a lower shell, connected with the end cover, the sliding support being located in the lower shell; a replacement core assembly, arranged in the sliding support, the sliding support and the replacement core assembly being synchronously linked and capable of being movably telescoped in the lower shell; characterized in that the resilient part is sleeved on the telescopic part and pre-pressed between the push button and the end cover; the outer wall of the telescopic part is sequentially provided with a plurality of driving columns, a plurality of adjusting columns and a plurality of clamping columns from top to bottom, the driving columns, the adjusting columns and the clamping columns are annularly and equally distributed, each driving column constitutes the driving block, the driving column generates driving by acting on the push button and is linked with the locking part, the adjusting column is located in the locking part to be movably adjusted, and the telescopic part can be telescopically locked with the locking part through the clamping column.

2. The silent push pencil according to claim 1, wherein: an opening downwardly directed compression sleeve is arranged in the push button, the upper part of the telescopic part is located in the compression sleeve, and the resilient part is pre-pressed between the compression sleeve and the end cover.

3. The silent push pencil of claim 2 wherein: the first channel is sequentially provided with an upper channel section, a first annular step surface, a second annular step surface and a lower channel section from top to bottom, the second annular step surface is provided with a plurality of annularly and equally distributed guide blocks, each guide block constitutes the driving part, each guide block is provided with a first guide inclined surface, each driving column is located between the lower end surface of the opening of the compression sleeve and the second annular step surface and constitutes the driving block, and the lower end of each driving column is rotatably connected with each first guide inclined surface.

4. The silent push pencil of claim 3 wherein: the inner wall of the lower channel section is provided with a plurality of annularly and equally distributed arc-shaped pieces, a strip-shaped gap is formed between adjacent two arc-shaped pieces, the lower side edge of each arc-shaped piece is provided with a blocking block clamped with each clamping column, and the strip-shaped gap and the blocking block jointly constitute the locking part.

5. The silent push pencil of claim 4 wherein: the lower side edge of the blocking block is provided with a clamping groove and a second guide inclined surface; when the upper end of the clamping column is clamped with the clamping groove, the telescopic part is extended to be locked, the adjusting column is located in the annular region surrounded by the arc-shaped pieces; the upper end of the clamping column is rotatably connected with the second guide inclined surface, the telescopic part is retracted and stored when the clamping column is located in the strip-shaped gap, and the adjusting column is located in the upper channel section.

6. The silent push pencil of claim 3 wherein: the lower end opening outer wall of the compression sleeve is provided with a limiting ring, the resilient part is a compression spring, the compression spring is sleeved on the telescopic part and pre-pressed between the limiting ring and the first annular step surface.

7. The silent push pencil of claim 6 wherein: the limiting ring is composed of a plurality of annularly and equally distributed limiting blocks.

8. The silent push pencil of claim 3 wherein: The inner diameter of the upper channel section is greater than the inner diameter of the first annular step surface, the inner diameter of the first annular step surface is greater than the inner diameter of the second annular step surface, and the inner diameter of the second annular step surface is equal to the inner diameter of the lower channel section; the driving column, the adjusting column and the clamping column are on the same axis; the width of the driving column is greater than the width of the clamping column, and the width of the clamping column is greater than the width of the adjusting column.

9. The silent push pencil of claim 1 wherein: The limiting baffle is provided with a limiting column, and the lower end surface of the telescopic part is provided with a limiting slot with a notch facing downward, and the limiting column is located in the limiting slot.

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