Throttle valve control device

Abstract

To provide a throttle valve control device which can be reduced in the number of part items.SOLUTION: A throttle valve control device comprises a motor 3, a motor gear 31, a throttle shaft 4 to which a throttle gear 32 is attached, an intermediate gear 33, a throttle valve 5, a body 2 and a gear cover 7. The motor gear 31 is attached to a drive shaft 3A of the motor 3. The intermediate gear 33 transmits the rotation of the motor gear 31 to the throttle gear 32. The throttle valve 5 is attached to the throttle shaft 4. The body 2 has the motor gear 31, the throttle gear 32, a gear accommodation part 12 in which the intermediate gear 33 is arranged, and an intake passage 11a whose opening area is changed by the rotation of the throttle valve 5. The gear cover 7 has a gear shaft protrusion 64 for rotatably supporting the intermediate gear 33.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a throttle valve control device for use in an internal combustion engine. [Background technology]

[0002] The throttle valve control device described in Patent Document 1 transmits the power of a motor to a throttle shaft through a gear train, and operates a throttle valve directly connected to the throttle shaft. The gear train has an intermediate gear that transmits the power of the motor gear to the throttle gear. The intermediate gear is rotatably supported by a gear shaft that is press-fitted into the body of the throttle valve control device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-118060 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is a demand for a further reduction in the number of parts in the throttle valve control device.

[0005] SUMMARY OF THE PRESENT EMBODIMENT In consideration of the above problems, an object of the present invention is to provide a throttle valve control device capable of reducing the number of parts. [Means for solving the problem]

[0006] In order to solve the above problems and achieve the object of the present invention, a throttle valve control device reflecting one aspect of the present invention includes a motor, a throttle valve shaft to which a drive gear and a driven gear are attached, an intermediate gear, a throttle valve, a body, and a gear cover. The drive gear is attached to the drive shaft of the motor. The intermediate gear transmits rotation of the drive gear to the driven gear. The throttle valve is attached to the throttle valve shaft. The body has a gear accommodating portion in which the drive gear, driven gear, and intermediate gear are disposed, and an intake passage whose opening area changes with rotation of the throttle valve. The gear cover has a gear support protrusion that rotatably supports the intermediate gear. Effect of the Invention

[0007] According to the throttle valve control device having the above configuration, the number of parts can be reduced. Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a throttle valve control device according to one embodiment; [Diagram 2] 1 is a cross-sectional view of a throttle valve control device according to one embodiment. [Diagram 3] FIG. 2 is a perspective view showing a gear housing portion of the throttle valve control device according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along the line AA shown in FIG. [Diagram 5] 11 is a cross-sectional view showing a state in which an intermediate gear is disposed in a gear housing portion of a body according to one embodiment. FIG. [Figure 6] FIG. 2 is a perspective view of a gear cover according to one embodiment. [Figure 7] 11A to 11C are diagrams illustrating a state in which a gear cover is being attached to a body according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functions or configurations are designated by the same reference numerals, and redundant description will be omitted.

[0010] [Configuration of throttle valve control device] First, the configuration of a throttle valve control device according to one embodiment will be described with reference to FIGS. 1 to 4. FIG. Fig. 1 is a perspective view of a throttle valve control device according to one embodiment. Fig. 2 is a cross-sectional view of the throttle valve control device according to one embodiment. Fig. 3 is a perspective view showing a gear housing part of the throttle valve control device according to one embodiment. Fig. 4 is a cross-sectional view taken along line AA shown in Fig. 3.

[0011] 1 and 2, the throttle valve control device 1 includes a body 2, a motor 3, a throttle shaft 4, a throttle valve 5, a gear train 6, and a gear cover 7. The throttle shaft 4 corresponds to the throttle valve shaft of the present invention. The throttle valve 5 corresponds to the throttle valve of the present invention.

[0012] The body 2 is formed by, for example, aluminum die casting. The body 2 has an intake section 11 and a gear housing section 12. The intake section 11 is formed in a substantially cylindrical shape. A cylindrical hole of the intake section 11 is an intake passage 11a through which intake air supplied to an engine (not shown) passes.

[0013] A bearing boss portion 21 (see FIG. 2) is formed in the intake portion 11. The bearing boss portion 21 protrudes radially outward from the intake portion 11. A bearing hole that penetrates the intake portion 11 in the radial direction is formed in the bearing boss portion 21. One axial end of the throttle shaft 4 is inserted into the bearing hole of the bearing boss portion 21. Hereinafter, this one axial end of the throttle shaft 4 will be referred to as the "rear end". The other axial end of the throttle shaft 4 will be referred to as the "tip end".

[0014] The gear accommodating portion 12 is formed in a generally rectangular parallelepiped shape that is continuous with the outer peripheral surface of the intake portion 11. A recess 13 and a motor housing 14 are formed in the gear accommodating portion 12. The recess 13 and the motor housing 14 open to a surface of the gear accommodating portion 12 opposite to the intake portion 11. The motor housing 14 accommodates the motor 3.

[0015] The motor 3 is, for example, a brush type direct current motor (DC motor). The motor 3 is fixed to the motor housing 14 using screws. The motor 3 has a drive shaft 3A. The drive shaft 3A protrudes from the motor housing 14.

[0016] A bearing boss 22 and a positioning boss 23 are formed in the recess 13 of the gear accommodating portion 12. The bearing boss 22 faces the bearing boss 21 in the radial direction of the intake passage 11a. A bearing hole penetrating the intake portion 11 in the radial direction is formed in the bearing boss 22. An axial middle portion of the throttle shaft 4 passes through the bearing hole of the bearing boss 22.

[0017] The positioning boss 23 is disposed between the bearing boss 21 and the motor housing 14. As shown in Figures 3 and 4, the positioning boss 23 has a fitting hole 24. The fitting hole 24 extends in a direction substantially parallel to the drive shaft 3A of the motor 3. A gear support protrusion 64 (see Figure 2), described later, of the gear cover 7 fits into the fitting hole 24.

[0018] The positioning boss portion 23 has an engagement portion 25. The engagement portion 25 is formed in an annular shape that protrudes approximately perpendicularly from the upper surface of the positioning boss portion 23. The outer diameter of the engagement portion 25 is equal to the outer diameter of the positioning boss portion 23. An intermediate gear 33 (described later) of the gear train 6 engages with the engagement portion 25. The engagement portion 25 positions the intermediate gear 33 and prevents the intermediate gear 33 from shifting from the positioning boss portion 23.

[0019] The throttle shaft 4 is, for example, a metallic rotating shaft. As shown in FIG. 2, the throttle shaft 4 extends radially of the intake section 11. The throttle shaft 4 is approximately parallel to the drive shaft 3A of the motor 3. The throttle shaft 4 passes through the intake passage 11a and the bearing boss portion 22. The tip of the throttle shaft 4 protrudes from the gear accommodating portion 12.

[0020] A needle bearing 26A is press-fitted and fixed in the bearing hole of the bearing boss portion 21. The needle bearing 26A rotatably supports the rear end of the throttle shaft 4. A needle bearing 26B is press-fitted and fixed in the bearing hole of the bearing boss portion 22. The needle bearing 26B rotatably supports the axial middle portion of the throttle shaft 4.

[0021] The needle bearings 26A, 26B seal the gap between the bearing boss portions 21, 22 and the throttle shaft 4. In other words, the needle bearings 26A, 26B seal the bearing holes of the bearing boss portions 21, 22. This prevents air from entering or leaving the intake passage 11a through the bearing holes of the bearing boss portions 21, 22. Furthermore, the lubricating grease used in the needle bearings 26A, 26B does not leak out into the outside air or into the gear accommodating portion 12.

[0022] A cap 27 is attached to the outer end of the bearing hole of the bearing boss portion 21. The cap 27 seals the bearing hole of the bearing boss portion 21 to prevent the rear end of the throttle shaft 4 and the needle bearing 26A from being exposed. In addition, the cap 27 prevents foreign matter such as dust from entering the needle bearing 26A and the rear end of the throttle shaft 4.

[0023] A slit is formed in the axial middle portion of the throttle shaft 4. A thrust retainer 28 is engaged with the slit in the throttle shaft 4. The thrust retainer 28 is, for example, a C-type washer. A clearance is formed between the bottom of the slit in the throttle shaft 4 and the inner periphery of the thrust retainer 28. This allows the throttle shaft 4 to rotate about its axis while engaged with the thrust retainer 28.

[0024] A circumferentially continuous engagement protrusion is formed on the inner peripheral surface of the bearing boss portion 21. The thrust retainer 28 is sandwiched between the needle bearing 26B and the engagement protrusion of the bearing boss portion 21. In this way, the needle bearing 26B restricts the axial movement of the throttle shaft 4.

[0025] The throttle valve 5 is attached to the throttle shaft 4 and disposed in the intake passage 11a. The throttle valve 5 is formed in a disk shape made of metal. The throttle valve 5 has a fixing piece 5a that protrudes from one flat surface of the throttle valve 5. The fixing piece 5a is inserted into a slit formed in the throttle shaft 4 and fixed to the throttle shaft 4 by a plurality of screws 29.

[0026] When the throttle shaft 4 rotates, the throttle valve 5 rotates in the intake passage 11a, changing the opening area of ​​the intake passage 11a. The throttle valve 5 changes the opening area of ​​the intake passage 11a to control the flow rate of the intake air supplied to the engine.

[0027] The gear train 6 is disposed in the gear housing portion 12 of the body 2. The gear train 6 is a reduction mechanism having a motor gear 31, a throttle gear 32, and an intermediate gear 33. Rotation of the drive shaft 3A of the motor 3 is transmitted to the throttle shaft 4 via the gear train 6. The motor gear 31 of the gear train 6 corresponds to the drive gear according to the present invention. The throttle gear 32 corresponds to the driven gear according to the present invention.

[0028] The motor gear 31 is attached to the drive shaft 3A of the motor 3. The motor gear 31 is made of, for example, metal. A plurality of teeth are formed on the outer circumferential surface of the motor gear 31. The number of teeth of the motor gear 31 is smaller than the number of teeth of the intermediate gear 33 and the throttle gear 32.

[0029] The throttle gear 32 is attached to the tip of the throttle shaft 4. The throttle gear 32 has a metal plate 41 and a gear portion 42 made of resin. The metal plate 41 and the gear portion 42 are integrally formed by resin molding. The metal plate 41 has a through hole through which the tip of the throttle shaft 4 passes.

[0030] The periphery of the through hole of the metal plate 41 is a nut abutment surface. The metal plate 41 is joined to the gear portion 42 on the outer side of the nut abutment surface. The gear portion 42 is formed in a generally circular plate shape having an appropriate thickness. A plurality of teeth are formed on the outer peripheral surface of the gear portion 42. A fitting cylinder portion 42a is formed on the upper surface of the gear portion 42. In addition, a spring locking portion (not shown) is formed on the lower surface of the gear portion 42.

[0031] A thread groove is formed at the tip of the throttle shaft 4. A nut 43 is screwed onto the tip of the throttle shaft 4 that passes through a through hole in the metal plate 41. In this way, the throttle gear 32 is fixed to the throttle shaft 4. The metal plate 41 may be fixed to the throttle shaft 4 by welding.

[0032] A return spring 45 is disposed between the gear portion 42 of the throttle gear 32 and the gear housing portion 12. The return spring 45 is, for example, a helical spring. The return spring 45 surrounds the outer circumferential surface of the bearing boss portion 22. One end of the return spring 45 is engaged with a spring engaging portion formed in the gear housing portion 12. The other end of the return spring 45 is engaged with a notch formed in the default lever 46.

[0033] The return spring 45 biases the default lever 46 in the closing direction of the throttle valve 5. A notch is formed in the default lever 46. The notch of the default lever 46 engages with a stopper formed in the gear accommodating portion 12. The stopper prevents the default lever 46 from rotating beyond a certain angle.

[0034] A default spring 47 is disposed between the gear portion 42 of the throttle gear 32 and the default lever 46. One end of the default spring 47 is engaged with the default lever 46. The other end of the default spring 47 is engaged with a spring engaging portion formed on the gear portion 42 of the throttle gear 32.

[0035] The default spring 47 biases the throttle gear 32 in the opening direction of the throttle valve 5. The throttle gear 32 is fitted to the default lever 46 so as to be rotatable up to a certain angle. In other words, the default lever 46 prevents the throttle gear 32 from rotating beyond a certain angle.

[0036] A rotor 48 (see FIGS. 3 and 4) is attached to the gear portion 42 of the throttle gear 32. The rotor 48 has a connecting tubular portion 48a. The connecting tubular portion 48a of the rotor 48 fits into the inner circumferential surface of the fitting tubular portion 42a. The rotor 48 rotates together with the throttle gear 32 and the throttle shaft 4. The rotor 48 faces the gear cover 7.

[0037] [Intermediate gear] Next, the intermediate gear 33 will be described with reference to FIG. FIG. 5 is a cross-sectional view showing a state in which the intermediate gear 33 is disposed in the gear accommodating portion 12. As shown in FIG.

[0038] As shown in Fig. 5, the intermediate gear 33 has a large diameter gear portion 51 and a small diameter gear portion 52. The large diameter gear portion 51 and the small diameter gear portion 52 are integrally formed by resin molding. The large diameter gear portion 51 is formed in a disk shape of an appropriate thickness. A plurality of teeth are formed on the outer circumferential surface of the large diameter gear portion 51. The plurality of teeth of the large diameter gear portion 51 mesh with a plurality of teeth of the motor gear 31.

[0039] The small diameter gear portion 52 protrudes from the lower surface of the large diameter gear portion 51. The small diameter gear portion 52 is coaxial with the large diameter gear portion 51 and is formed in a cylindrical shape with a smaller diameter than the large diameter gear portion 51. A plurality of teeth are formed on the outer circumferential surface of the small diameter gear portion 52. The plurality of teeth of the small diameter gear portion 52 mesh with a plurality of teeth of the throttle gear 32.

[0040] The intermediate gear 33 has a circular shaft hole 53 penetrating the large diameter gear portion 51 and the small diameter gear portion 52. The shaft hole 53 has a large diameter hole portion 54 opening to the large diameter gear portion 51, a small diameter hole portion 55 opening to the small diameter gear portion 52, and a tapered portion 56. The large diameter hole portion 54 has a larger diameter than the small diameter hole portion 55. The small diameter hole portion 55 faces the fitting hole 24 of the positioning boss portion 23. The diameter of the small diameter hole portion 55 is slightly larger than the diameter of the fitting hole 24. The diameter of the tapered portion 56 gradually decreases from the large diameter hole portion 54 toward the small diameter hole portion 55.

[0041] The small diameter gear portion 52 has an engagement protrusion 57. The engagement protrusion 57 protrudes approximately perpendicularly from the end face of the small diameter gear portion 52 opposite to the large diameter gear portion 51. The engagement protrusion 57 is formed in an annular shape surrounding the small diameter hole portion 55. The engagement protrusion 57 slidably engages with the engagement portion 25 of the positioning boss portion 23. As a result, the intermediate gear 33 is positioned with respect to the positioning boss portion 23.

[0042] [Gear cover] Next, the gear cover 7 will be described with reference to FIG. FIG. 6 is a perspective view of the gear cover 7.

[0043] As shown in Fig. 6, the gear cover 7 has a cover body 61 and a throttle position sensor 62 attached to the cover body 61. The cover body 61 is made of, for example, resin, and is formed in a hollow, generally rectangular parallelepiped shape with one side open. The cover body 61 covers the gear accommodating portion 12. The cover body 61 is fixed to the gear accommodating portion 12 using a plurality of clips 63 (see Fig. 1).

[0044] The throttle position sensor 62 is fixed to the inner surface of the cover body 61 using a screw. The throttle position sensor 62 faces the rotor 48 attached to the throttle gear 32 (see FIG. 2). The throttle position sensor 62 detects the rotation angle of the rotor 48 (throttle shaft 4). The rotation angle of the throttle shaft 4 is used to detect the opening degree of the throttle valve 5.

[0045] The cover body 61 has a gear support protrusion 64. The gear support protrusion 64 protrudes approximately perpendicularly from the inner surface of the cover body 61. The gear support protrusion 64 is formed in an approximately cylindrical shape. The gear support protrusion 64 has a base end 65 continuing to the cover body 61, and a tip end 66 continuing to the base end 65. The tip end 66 of the gear support protrusion 64 has a smaller diameter than the base end 65.

[0046] The gear support protrusion 64 passes through the shaft hole 53 of the intermediate gear 33. The tip end 66 of the gear support protrusion 64 protrudes from the small diameter hole portion 55 of the intermediate gear 33 and fits into the fitting hole 24 of the positioning boss portion 23. The gear support protrusion 64 rotatably supports the intermediate gear 33. The large diameter hole portion 54 of the intermediate gear 33 is set to a diameter corresponding to the base end portion 65 of the gear support protrusion 64. The small diameter hole portion 55 of the intermediate gear 33 is set to a diameter corresponding to the tip end portion 66 of the gear support protrusion 64. This makes it possible to suppress or prevent rattling of the intermediate gear 33 when engaged with the gear support protrusion 64.

[0047] The rigidity of the gear support protrusion 64 can be increased by making the diameter of the base end 65 continuing to the cover body 61 larger than the diameter of the tip end 66. Also, since the gear support protrusion 64 is formed integrally with the cover body 61, the number of parts of the throttle valve control device 1 can be reduced compared to the case where the gear support protrusion and the cover body are prepared separately.

[0048] [Gear train assembly process] Next, the arrangement of the gear train 6 will be described with reference to FIGS. FIG. 7 is a diagram for explaining how the gear cover 7 is being attached to the body 2. As shown in FIG.

[0049] When assembling the gear train 6, an operator fixes the motor 3, to which the motor gear 31 is attached, to the motor housing 14 (see FIG. 5). Then, the operator causes the throttle shaft 4, to which the throttle gear 32 is attached, to be rotatably supported by the needle bearings 26A and 26B. As a result, the motor gear 31 and the throttle gear 32 are disposed in the gear accommodating portion 12.

[0050] Next, the worker places the intermediate gear 33 on the positioning boss portion 23 of the gear accommodating portion 12. At this time, the engaging protrusion 57 of the intermediate gear 33 engages with the engaging portion 25 of the positioning boss portion 23. This allows the worker to easily position the intermediate gear 33 on the positioning boss portion 23. At this time, the large diameter gear portion 51 of the intermediate gear 33 meshes with the motor gear 31. In addition, the small diameter gear portion 52 of the intermediate gear 33 meshes with the throttle gear 32.

[0051] Next, the worker attaches the gear cover 7 to the gear accommodating portion 12 of the body 2. At this time, the worker inserts the gear support protrusion 64 of the gear cover 7 into the shaft hole 53 of the intermediate gear 33 (see FIG. 7A). The diameter of the tip portion 66 of the gear support protrusion 64 is smaller than the diameter of the large diameter hole portion 54 of the intermediate gear 33. Therefore, the worker can easily insert the gear support protrusion 64 into the shaft hole 53 of the intermediate gear 33.

[0052] As the worker continues to insert the gear support protrusion 64 into the shaft hole 53, the tip 66 of the gear support protrusion 64 passes through the tapered portion 56 in the shaft hole 53 of the intermediate gear 33 (see FIG. 7B). At this time, even if the axis of the gear support protrusion 64 is misaligned with the axis of the shaft hole 53, the tapered portion 56 guides the gear support protrusion 64 into the small diameter hole portion 55. This allows the worker to easily insert the tip 66 of the gear support protrusion 64 into the small diameter hole portion 55 of the intermediate gear 33 (see FIG. 7C).

[0053] As the operator continues to insert the gear support protrusion 64 into the shaft hole 53, the tip portion 66 of the gear support protrusion 64 protrudes from the small diameter hole portion 55 in the shaft hole 53 of the intermediate gear 33 and is inserted into the fitting hole 24 of the positioning boss portion 23 (see FIG. 2). As a result, the intermediate gear 33 is positioned coaxially with the gear support protrusion 64 and is rotatably supported by the gear support protrusion 64. The gear cover 7 then engages with the gear accommodating portion 12.

[0054] Thereafter, the worker uses a plurality of clips 63 (see FIG. 1) to fix the gear cover 7 to the gear accommodating portion 12 (see FIG. 1). As a result, the gear train 6 is placed in the gear accommodating portion 12, and the assembly of the throttle valve control device 1 is completed.

[0055] A base end 65 of the gear support protrusion 64 is formed integrally with the cover body 61. A tip end 66 of the gear support protrusion 64 is fixed to the positioning boss portion 23. Thus, both ends of the gear support protrusion 64 are fixed. This can improve the rigidity of the gear support protrusion 64. Also, the positioning accuracy of the intermediate gear 33 by the gear support protrusion 64 can be improved.

[0056] The throttle valve control device according to the embodiment of the present invention has been described above, including its operation and effects. However, the throttle valve control device according to the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the invention described in the claims. For example, in the above-described embodiment, the gear train 6 is composed of three gears. However, the gear train according to the present invention may be composed of four or more gears.

[0057] The above-mentioned embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the configurations described. In addition, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

[0058] In this specification, words such as "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "nearly parallel" or "nearly orthogonal" state within a range in which the functions can be exerted. [Explanation of symbols]

[0059] 1...Throttle valve control device, 2...Body, 3...Motor, 3A...Drive shaft, 4...Throttle shaft (throttle valve shaft), 5...Throttle valve (throttle valve), 6...Gear train, 7...Gear cover, 11...Intake section, 11a...Intake passage, 12...Gear accommodating section, 13...Recess, 14...Motor housing, 21, 22...Bearing boss section, 23...Positioning boss section, 24...Fitting hole, 25...Engagement section, 26A, 26B...Needle bearing, 27...Cap, 28...Thrust retainer, 31...Motor gear (driving gear), 32...Throttle gear (driven gear), 33...Intermediate gear, 41...Metal plate, 42...Gear section, 42a...Fitting cylinder section, 43...Nut, 45...Return spring, 46...Default lever, 47...Default spring, 48... rotor, 51... large diameter gear portion, 52... small diameter gear portion, 53... shaft hole, 54... large diameter hole portion, 55... small diameter hole portion, 56... tapered portion, 57... engagement protrusion, 61... cover body, 62... throttle position sensor, 63... clip, 64... gear support protrusion, 65... base end portion, 66... ​​tip portion

Claims

1. A motor; A drive gear attached to a drive shaft of the motor; a throttle valve shaft having a driven gear attached thereto; an intermediate gear that transmits rotation of the drive gear to the driven gear; a throttle valve attached to the throttle valve shaft; a body including a gear accommodating portion in which the drive gear, the driven gear, and the intermediate gear are disposed, and an intake passage whose opening area changes with rotation of the throttle valve; A gear cover that covers the gear housing portion, The gear cover has a gear support protrusion that rotatably supports the intermediate gear. Throttle valve control device.

2. The gear support protrusion is formed in a cylindrical shape and has a base end and a tip end having a diameter smaller than that of the base end.

2. The throttle valve control device of claim 1.

3. the intermediate gear has a shaft hole through which the gear support protrusion passes, The shaft hole has a large diameter hole portion whose diameter is set according to the base end portion of the gear support protrusion, and a small diameter hole portion whose diameter is set according to the tip end portion of the gear support protrusion.

3. The throttle valve control device of claim 2.

4. the shaft hole of the intermediate gear has a tapered portion between the large diameter hole portion and the small diameter hole portion, The tapered portion has a gradually smaller diameter from the large diameter portion toward the small diameter portion.

4. The throttle valve control device according to claim 3.

5. The body has an engagement portion with which the intermediate gear is rotatably engaged.

2. The throttle valve control device of claim 1.

6. The body has a fitting hole into which the gear support protrusion fits.

2. The throttle valve control device of claim 1.

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