recording device

Abstract

This invention discloses a recording device. The recording device includes: a delivery unit for conveying a recording medium toward a recording head for ejecting liquid in a first direction; a housing including a receiving chamber for receiving liquid to be supplied to the recording head and an injection port through which liquid is injected into the receiving chamber, the housing being arranged downstream of the delivery unit in the first direction; a rotatable lever holding a cap for closing the injection port; and a cover rotating about a rotation axis between an open position for exposing the lever and a closed position for covering the lever, the rotation axis being arranged upstream of the delivery unit in the first direction. The cover includes a sliding portion disposed on a surface facing the lever and contacting the lever when the cover is rotated toward the closed position.

Description

[0001] This invention is a divisional application of the invention patent application filed on July 23, 2021, with application number 202110837168.8 and invention title "Recording Device". Technical Field

[0002] This disclosure relates to a recording apparatus for recording images. Background Technology

[0003] Typically, a known inkjet recording device includes an ink cartridge that holds ink to be supplied to a recording head for ink ejection. The ink cartridge has a fill port through which a user can fill the cartridge with ink. The user can fill the cartridge with ink by removing a cap that closes the fill port.

[0004] Japanese Patent Application Publication No. 2018-69705 discloses a printer comprising a casing cover that allows the injection port to be opened and closed, and an outer cover supported on a housing by a shaft and allowing the transport path of the recording medium to be exposed. When the user performs the operation of closing the outer cover without closing the casing cover, the outer cover abuts against the casing cover and cannot be closed. This prevents the user from closing the outer cover while the casing cover is open. Japanese Patent Application Publication No. 2018-69705 also discloses a configuration in which, when the user performs the operation of closing the casing cover without closing the cap, the cap can be moved to a position where the cap can be closed in conjunction with the operation of closing the casing cover.

[0005] However, using the configuration disclosed in Japanese Patent Application Publication No. 2018-69705, the user needs to close the cap, box cover, and outer cover after ink injection is complete, which may cause inconvenience to the user. Summary of the Invention

[0006] This disclosure aims to provide a recording device with a simple configuration that prevents the injection port from being forgotten to be closed.

[0007] According to one aspect of this disclosure, a recording apparatus is provided, comprising: a delivery unit configured to deliver a recording medium toward a recording head for ejecting liquid in a first direction; a housing including a receiving chamber for receiving liquid to be supplied to the recording head and an injection port through which liquid is injected into the receiving chamber, the housing being disposed downstream of the delivery unit in the first direction; a lever configured to rotate and retain a cap for closing the injection port; and a cover configured to rotate about a rotation axis between an open position for exposing the lever and a closed position for covering the lever, the rotation axis being disposed upstream of the delivery unit in the first direction. The cover includes a sliding portion disposed on a surface facing the lever and configured to contact the lever when the cover is rotated toward the closed position.

[0008] Other features of this disclosure will become clear from the following description of exemplary embodiments (with reference to the accompanying drawings). Attached Figure Description

[0009] Figure 1 This is a perspective view illustrating the internal configuration of an inkjet recording apparatus according to a first exemplary embodiment.

[0010] Figure 2 This is a cross-sectional schematic diagram illustrating the outline of each of the ink cartridges according to a first exemplary embodiment.

[0011] Figures 3A to 3C Each is a perspective view illustrating the ink cartridge inlet and the area surrounding the inlet according to the first exemplary embodiment.

[0012] Figure 4A and 4B These are diagrams illustrating the configuration of the retaining cap control lever according to the first exemplary embodiment.

[0013] Figures 5A to 5C These are schematic diagrams illustrating the appearance of the inkjet recording apparatus according to the first exemplary embodiment.

[0014] Figure 6 This is a cross-sectional view illustrating the scenario in which the scanning unit is shut down without either injection port being closed by the cap, according to a first exemplary embodiment.

[0015] Figure 7 This is a cross-sectional view illustrating the situation where the user is turning off the scanning unit according to a first exemplary embodiment.

[0016] Figure 8 This is an example perspective view illustrating the appearance of the injection port for black ink not being closed by the cap, according to a first exemplary embodiment.

[0017] Figure 9 This is another cross-sectional view illustrating the situation where the user is turning off the scanning unit according to the first exemplary embodiment.

[0018] Figure 10 This is a cross-sectional view illustrating an example of a change in the sliding surface of a scanning unit.

[0019] Figure 11 This is a perspective view illustrating a scenario where ink is being injected into one of the ink cartridges according to a first exemplary embodiment.

[0020] Figure 12 This is a top view schematic diagram illustrating a case where ink is being injected into one of the ink tanks according to a first exemplary embodiment. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described with reference to the accompanying drawings. The illustrative embodiments described below are not intended to limit the scope of the present disclosure, and not all combinations of features described in the exemplary embodiments are necessary for the solutions provided in the present disclosure. The relative arrangement and shape of components, etc., described in the exemplary embodiments are merely exemplary and are in no way intended to limit the scope of the present disclosure.

[0022] <Device Configuration>

[0023] Figure 1 This is a perspective view illustrating the internal structure of an inkjet recording apparatus (hereinafter referred to as "recording apparatus") 50 according to a first exemplary embodiment. The recording apparatus 50 includes a recording head 4 that jets ink (liquid) onto a recording medium to record an image. The recording apparatus 50 also includes a scanning unit 21 (see [reference needed]) that serves as a cover that can be opened and closed relative to the housing of the recording apparatus 50. Figures 5A to 5C ). Figure 1 An example is shown where the scanning unit 21 is removed from the recording device 50.

[0024] The recording device 50 separates a sheet of recording medium from the paper feed tray 51 stacked on the back or the paper feed cassette 52 stacked on the front, and feeds the sheet using a feed roller (not shown) serving as a feed unit. The recording medium fed by the feed roller is clamped between a transport roller 1 serving as a transport unit and a clamping roller 2 driven by the transport roller 1, and is transported in the direction indicated by arrow A (direction A) toward the recording position facing the recording head 4. The transport roller 1 is made of metal and has fine irregularities on its surface to generate high friction. The clamping roller 2 is elastically pressed against the transport roller 1 by a pressing member such as a spring (not shown).

[0025] The recording device 50 further includes a platen 3 positioned facing the recording head 4. Recording media delivered to the recording position is supported on its back by the platen 3. The platen 3 maintains a predetermined (constant) distance between the nozzle surface of the recording head 4, on which nozzles for ink ejection are provided, and the surface of the recording medium facing the nozzle surface. The recording medium is recorded by the recording head 4 at the recording position based on data. After recording by the recording head 4, the recording medium is clamped between an ejector roller (not shown) and a toothed roller (i.e., a rotator driven by the ejector roller) and ejected outside the recording device 50. The ejector roller is a rubber roller with a high coefficient of friction. The toothed roller elastically presses the ejector roller by a pressing member such as a spring (not shown).

[0026] In this exemplary embodiment, the direction in which the recording medium is transported by the transport unit (e.g., Figure 1The direction shown (A) is called the transport direction. Therefore, the upstream side of the transport direction corresponds to the back side of the recording device 50, and the downstream side of the transport direction corresponds to the front side of the recording device 50.

[0027] The recording head 4 is mounted on a carriage 7 that reciprocates along a main scanning direction that intersects the transport direction. As the carriage 7 is guided by two guide rails, an upper guide rail 5 and a lower guide rail 6, which extend in the main scanning direction, a drive unit, such as a motor, causes the carriage 7 to reciprocate. In this exemplary embodiment, the transport direction and the main scanning direction are orthogonal to each other.

[0028] When the recording head 4 and carriage 7 move together in the main scanning direction, the recording head 4 ejects ink droplets, thereby recording an image of a predetermined length (corresponding to one bandwidth) on the recording medium (referred to as a "recording operation"). After recording an image corresponding to one bandwidth, the transport roller 1 and clamping roller 2 transport the recording medium in a predetermined quantity (referred to as an "intermittent transport operation"). Repeating the image recording operation and intermittent transport operation for one bandwidth allows the entire image to be recorded on the recording medium based on the image data.

[0029] The recording head 4 according to this exemplary embodiment includes elements (e.g., a heating resistor element) for generating thermal energy to be used as energy for inkjet printing, and utilizes the generated thermal energy to employ a method that changes the state of the ink (film boiling). This enables high-density and high-resolution image recording. The inkjet method according to this exemplary embodiment is not limited to methods using thermal energy, but can also be a method using piezoelectric transducers and vibrational energy.

[0030] In this exemplary embodiment, the recording head 4 is described as a serial head mounted on a reciprocating carriage 7. The recording head 4 according to this disclosure is not limited to this and may be a wire head having a plurality of nozzles arranged in an area corresponding to the width of the recording medium.

[0031] The recording device 50 is provided with ink cartridges 8 containing ink of the corresponding color that can be ejected by the recording head 4. In this exemplary embodiment, the ink cartridges 8 are fixed to the front of the recording device 50. The recording device 50 according to this exemplary embodiment includes a black ink cartridge 8K for containing black ink, a cyan ink cartridge 8C for containing cyan ink, a magenta ink cartridge 8M for containing magenta ink, and a yellow ink cartridge 8Y for containing yellow ink. These four ink cartridges 8K, 8C, 8M, and 8Y are collectively referred to as ink cartridges 8. Cyan, magenta, and yellow inks are examples of colored inks, and the colored inks according to this exemplary embodiment are not limited thereto.

[0032] like Figure 1As shown, viewed from the front of the recording device 50, the black ink cartridge 8K is arranged to the left of the paper feed cassette 52. On the other hand, viewed from the front of the recording device 50, the cyan ink cartridge 8C, magenta ink cartridge 8M, and yellow ink cartridge 8Y are arranged to the right of the paper feed cassette 52. In other words, the paper feed cassette 52 is arranged between the black ink cartridge 8K and the color ink cartridges 8C, 8M, and 8Y. The ink cartridges 8 are connected to the recording head 4 via flexible supply tubes 9 that form supply flow paths for supplying ink to the recording head 4. Therefore, the ink contained in each ink cartridge 8 can be independently supplied to the nozzle array of the recording head 4 corresponding to the color of each ink.

[0033] Figure 2 This is a cross-sectional schematic diagram illustrating the outline of each of the ink cartridges 8. Each of the ink cartridges 8 includes an ink receiving chamber 12, having an air vent and an air passage 11 configured to communicate with air, and a buffer chamber 13 disposed above the ink receiving chamber 12. During recording operation, each time a certain amount of ink is ejected from the recording head 4, the same amount of ink is subsequently supplied from the ink receiving chamber 12 via the supply tube 9. An amount of air (atmosphere) equal to the amount of ink consumed by the ink receiving chamber 12 is introduced into the ink receiving chamber 12 via the buffer chamber 13 from the air passage 11. Each of the ink cartridges 8 has a transparent viewing surface 12a, which allows a user to inspect the amount of ink in the ink receiving chamber 12 through a window formed on the front of the recording device 50.

[0034] Each of the ink cartridges 8 also has an inlet 14 on its top. The inlet 14 is an opening for injecting ink and can be sealed (closed) by a cap 15. The cap 15 is formed of a rubber-elastic component. The ink cartridge 15 is removed from the inlet 14, and the ink bottle 23 (see [link to ink refill bottle]) is then removed. Figure 11 Insert the ink inlet 14, and the user can inject ink from the ink bottle 23 into the ink tank 8.

[0035] Figures 3A to 3C These are perspective views illustrating the ink cartridge 8's inlet 14 and the area surrounding it. A cartridge cap 15 is attached to a user-operable cap lever 16. The cap lever 16 is rotatably supported on a central frame 17 fixed to the main body of the recording device 50. During recording operations of the recording head 4, the cap lever 16 is in the following position... Figure 3A The cap 15 shown closes the cap of the injection port 14.

[0036] To refill ink, the user can operate the desired cap operating lever 16 to open the cap 15. At this time, the cap operating lever 16 rotates to switch to the desired position. Figure 3BThe cap is shown in the open state. If the user continues to rotate the cap control lever 16, the rotated lever 16 will abut against the retaining portion 18 protruding upwards from the intermediate frame 17. This abutment against the retaining portion 18 will cause the cap control lever 16 to elastically deform and cross over the retaining portion 18, thus switching the cap control lever 16 to the open state. Figure 3C The cap lever shown is in the holding position.

[0037] Reference Figure 4A and 4B The configuration of the retaining part 18 and the retaining cap lever 16 is described. Figure 4A This is an enlarged view of the recording device 50 from the front, showing the holding part 18, the cap control lever 16 in the cap control lever holding state, and the surrounding area.

[0038] The cap control lever 16 includes a control lever rotation axis 19 supported by the intermediate frame 17, allowing the cap control lever 16 to rotate about the control lever rotation axis 19. The cap control lever 16 also has a hole of a predetermined length formed in the direction from the control lever rotation axis 19 toward the attachment portion to which the cap 15 is attached. When the cap control lever 16 is switched from the cap open state to the cap control lever held state, the contact rib 20 of the cap control lever 16 will contact the holding portion 18, so that the inner side 200 surrounding the hole will... Figure 4A As shown, it elastically deforms in the opening direction. At this time, the contact rib 20, which is part of the inner part 200, will also elastically deform, and the contact rib 20 of the cap control lever 16, which is being rotated by the user, will cross the retaining part 18 so that the cap control lever 16 becomes the cap control lever retaining state.

[0039] Figure 4B This is a top view illustrating the positional relationship between the cap lever 16 and the retaining portion 18 when viewed from above in the cap lever holding state. After the contact rib 20 of the cap lever 16 crosses the retaining portion 18, the inner side 200 of the cap lever 16 and the retaining portion 18 abut against each other. Therefore, even if the user releases their hand from the cap lever 16, the cap lever 16 remains in an upright position in the cap lever holding state. In this exemplary embodiment, when the cap lever 16 is switched to the cap lever holding state, the user can feel a locking sensation through the cap lever 16. Furthermore, a sound is emitted when the contact rib 20 crosses the retaining portion 18.

[0040] The opening direction of the inner side 200 of the cap control lever 16 is opposite to the removal direction in which the cap control lever 16 is removed from the intermediate frame 17. Specifically, when the cap control lever 16 is rotated by the user, a force is applied to the cap control lever 16 in the opening direction, and no force is applied to the cap control lever 16 in the removal direction opposite to the opening direction. This prevents the cap control lever 16 from being removed by rotation.

[0041] Regarding the configuration for retaining the cap lever 16, the elastic deformation of the cap lever 16 and its arrangement across the retaining portion 18 have been described in this exemplary embodiment. Alternatively, the cap lever 16 may be retained by friction, for example.

[0042] Figure 11 This is a perspective view illustrating the operation of injecting ink into the color ink tank (magenta ink tank 8M) on the right side, as seen from the front of the recording device 50. Figure 11 This illustrates the state of ink being poured from ink bottle 23 into magenta ink tank 8M.

[0043] The ink bottle 23 comprises an ink receiving portion 24 containing ink and an ink outlet portion 25 having an outlet through which ink can be injected into an inlet 14. According to this exemplary embodiment, the ink bottle 23 is cylindrical and has curved side surfaces. The cap operating lever 16 is arranged so that when it is in the cap operating lever held state by the holding portion 18, the cap operating lever 16 does not come into contact with the ink bottle 23 from which ink is being injected.

[0044] Figure 12 This is an example of what it looks like from the vertical direction (from above). Figure 11 This is a top view showing the positional relationship between the cap control lever 16 and the ink outlet 25 during ink injection operation. On the outer surface of the retaining portion of the retaining cap 15, each cap control lever 16 has a recess 16r that appears as a depression when viewed from above. The recess 16r is curved along the side of the ink bottle 23 to prevent contact with... Figure 12 The curved side contact of the ink bottle 23 shown.

[0045] By providing a recess 16r in the cap control lever 16, for example, except for the cap control lever 16M of the magenta ink tank 8M, magenta ink can be injected into the magenta ink tank 8M when the cap control levers 16C and 16Y are held in the cap-closed state. The ink bottle 23 according to this exemplary embodiment is composed of an ink receiving portion 24 and an ink outlet portion 25, but is not limited thereto. Alternatively, the ink receiving portion 24 and the ink outlet portion 25 may be integrally formed.

[0046] Figures 5A to 5C These are schematic diagrams illustrating the appearance of each recording device 50. For example... Figure 5A As shown, the recording device 50 has a scanning unit 21 that serves as a reading unit for reading images of original documents placed thereon. The scanning unit 21 can be opened and closed relative to the housing of the recording device 50. Figure 5A The example shows the scanning unit 21 in the off state (off position).

[0047] When the scanning unit 21 is opened by the user, the transport roller 1, recording head 4, injection port 14, and cap control lever 16 are exposed. When the scanning unit 21 is closed by the user, the transport roller 1, recording head 4, injection port 14, and cap control lever 16 are covered by the scanning unit 21. More specifically, by opening the scanning unit 21, the user can access the transport path of the recording medium to perform operations such as removing stuck sheets of the recording medium from the transport path.

[0048] The rotation axis serving as the rotation center of the scanning unit 21 is along the axis of rotation. Figure 5A The direction indicated by arrow A (conveyor direction) is located upstream of conveyor roller 1. When scanning unit 21 is closed, cap control lever 16 is covered by scanning unit 21, thereby preventing the user from operating cap control lever 16.

[0049] Figure 5B These are a front view and a partial enlarged view of the front of the recording device 50. When the scanning unit 21 is closed, the gap G is set as an opening between the scanning unit 21 and the outer cover 230 of the housing. Therefore, even when the scanning unit 21 is closed, the user can see the cap control lever 16 through the gap G. Each cap control lever 16 is color-coded to correspond to the color of the ink contained in the ink cartridge 8, so the user can identify the location of the ink to be injected without opening the scanning unit 21.

[0050] To inject ink, the user first turns on the scanning unit 21 and then opens the cap 15 (cap lever 16) corresponding to the color of the ink to be injected, thereby producing a result such as... Figure 5C The state shown. Figure 5C The position of the open scanning unit 21 shown is called the open position. When the scanning unit 21 is in the open position, the recording device 50 detects that the scanning unit 21 is open by using a sensor (not shown), thereby interrupting or prohibiting the execution of the recording operation, etc. After completing the process from the ink bottle 23 (see...) Figure 11 After the ink is injected, the user closes the cap 15 (cap lever 16) and then turns off the scanning unit 21, thereby enabling the use of the recording device 50 (recording operation).

[0051] Figure 6 This is a cross-sectional view illustrating a user's operation of closing the scanning unit 21 without closing the cap 15 (cap lever 16). The scanning unit 21 has a sliding surface (or sliding portion) 22 that is at least partially curved and disposed on the surface facing the cap lever 16, and is capable of contacting the cap lever 16. When the user performs the operation of closing the scanning unit 21 while the cap lever 16 is still in the cap lever held state, as the scanning unit 21 moves to the closed position, the curved portion of the sliding surface 22 and the cap lever 16 come into contact (abut) with each other at contact point A.

[0052] The angles of the curved surface of the sliding surface 22 will now be described. In the curved portion of the sliding surface 22, the angle between the direction of gravity Z at contact point A and the normal when the cap lever 16 is in the cap lever holding state is defined as angle α. Additionally, the angle between the direction of gravity Z and the straight line connecting contact point A and the lever rotation axis 19 is defined as angle β. In this case, the sliding surface 22 is formed to satisfy the relationship that angle α > angle β.

[0053] Furthermore, the angle of the curved surface is set such that, through the contact point A between the scanning unit 21 and the cap control lever 16, the gravity of the scanning unit 21 applies a force to the cap control lever 16 in the closing direction. In other words, when the cap control lever 16 is in contact with the curved surface portion of the sliding surface 22, the cap control lever 16 applies force toward the position where the cap 15 closes the injection port 14. Therefore, even if the user forgets to close the cap 15, closing the scanning unit 21 can release the cap control lever 16 from the cap control lever holding state and switch it to the cap closed state.

[0054] Figure 7 This is an example of a user in Figure 6 The diagram shows a cross-sectional view of the scanning unit 21 in the closed state. According to this exemplary embodiment, the sliding surface 22 has a curved surface extending to the vicinity of the front of the recording device 50. Therefore, the cap control lever 16, when switched to the cap-off state, can continue to be guided by the sliding surface 22.

[0055] Using the above configuration, even if the user forgets to close the cap 15, closing the scanning unit 21 will still close the inlet 14. Therefore, this reduces the risk of ink evaporation or leakage from the ink tank 8 due to the user forgetting to close the cap 15.

[0056] Figure 8 This is an example perspective view showing the situation where, although the black cap lever 16K falls due to its own weight, the inlet 14 of the black ink cartridge 8K is not closed by the cap 15. Figure 8 In the middle, scanning unit 21 is in the open position. Figure 8 In the state shown, the black cap lever 16K is not held by the retainer 18 and falls under the influence of gravity. As a result, the inlet 14 is not closed by the cap 15.

[0057] Figure 9 This is an example of a user in Figure 8The diagram shows a cross-sectional view of the scan unit 21 in its closed state. According to this exemplary embodiment, the sliding surface 22 has a horizontal portion 22S closer to the front of the recording device 50 than the curved surface. Closing the scan unit 21 causes the black cap lever 16K to fall under gravity and contact the horizontal portion 22S, thereby closing the injection port 14. More specifically, the gravity of the scan unit 21 causes the cap lever 16 to press the cap 15 downwards (in the direction of closing the injection port 14) from the horizontal portion 22S in contact with it. Therefore, when the injection port 14 is not closed by the cap 15, if the user closes the scan unit 21, the operation of closing the scan unit 21 causes the sliding surface 22 (horizontal portion 22S) to contact the cap lever 16, thereby closing the injection port 14.

[0058] The sliding surface 22 is positioned facing both the black cap lever 16K and the color cap lever 16. The sliding surface 22 facing the color cap lever 16 is positioned across an area that can face all three cap levers 16. Providing a common sliding surface 22 for multiple cap levers 16 simplifies the configuration of the recording device 50. This configuration can be achieved by changing the length of the sliding surface 22 in the main scanning direction, regardless of whether the number of ink cartridges 8 (i.e., the number of cap levers 16 facing the sliding surface 22) increases or decreases.

[0059] Figure 10 This is a cross-sectional view illustrating a modified example of the sliding surface 22. In the first exemplary embodiment, an example is described where the sliding surface 22 has a curved surface extending near the front surface of the recording device 50. Figure 10 In the example, the sliding surface 22 has a horizontal portion 22S on the front side of the recording device 50. For example... Figure 10 As shown, configuring the sliding surface 22 to have a curved surface at least in the area facing the cap lever 16 in the cap lever holding state can produce a similar beneficial effect of preventing the cap 15 from being forgotten to be closed.

[0060] When the scanning unit 21 is described as an example of a cover that can be opened and closed relative to the housing of the recording device 50, a cover without a reading unit may be used. In this case, the weight of the cover and the distance from the rotation axis of the cover to the sliding surface 22 can be appropriately adjusted so that the cap 15 can close the injection port 14 under the action of the cover's gravity.

[0061] While this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the disclosed exemplary embodiments. The scope of the appended claims should be interpreted in the broadest possible sense to cover all such variations and equivalent structures and functions.

Claims

1. A printing apparatus, comprising: The container includes a chamber configured to contain liquid to be supplied to the printhead and an inlet through which the liquid is injected into the chamber; A rod, configured to hold a cap that covers the injection port; as well as The cover is configured to rotate about a rotation axis between a covered position for covering the rod and the printhead and an exposed position for exposing the rod and the printhead. The rod is rotatable between a first position exposing the injection port and a second position not exposing the injection port. When the cover rotates from the exposed position to the covered position, the rod in the first position rotates to the second position by contacting the cover.

2. The printing apparatus according to claim 1, further comprising: A retaining element is configured to releasably retain the rod in the first position.

3. The printing apparatus according to claim 1, further comprising: A conveyor roller is configured to convey printing media toward the print head in a first direction. The rotating shaft is arranged upstream of the conveying roller in the first direction.

4. The printing apparatus according to claim 1, further comprising: A conveyor roller is configured to convey printing media toward the print head in a first direction. The box is arranged downstream of the conveyor roller in the first direction.

5. The printing apparatus according to claim 1, wherein, The cover includes a reading unit configured to read an image of the original document.

6. The printing apparatus according to claim 1, wherein, The rod is a color-coded symbol corresponding to the color of the liquid contained in the chamber.

7. The printing apparatus according to claim 1, wherein, With the cover in the covered position, at least a portion of the rod is visible through the opening between the cover and the housing of the printing device.

8. The printing apparatus according to claim 1, wherein, The cover includes a sliding portion disposed on a surface facing the rod, the sliding portion being configured to contact the rod when the cover rotates toward the covered position.

9. The printing apparatus according to claim 2, wherein, When the rod rotates toward the first position, the rod contacts the retaining part and elastically deforms, so that the rod is held by the retaining part.

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