US-12623581-B2 - Conveyance seat

US12623581B2US 12623581 B2US12623581 B2US 12623581B2US-12623581-B2

Abstract

Provided is a conveyance seat having a seat frame that suppresses a resonance by a simple means in a seat frame with an actuator. A conveyance seat is a conveyance seat having a seat frame with an actuator and includes a resonance suppressing portion which is formed in at least a part of the seat frame by a first uneven region formed by continuously forming a plurality of non-penetrating recesses and/or protrusions. Since the natural frequency of the seat frame changes, the resonance of the seat frame due to the operational vibration of the actuator can be suppressed.

Inventors

Yasuo Inose
Yuta Yaguchi
Katsuhiro Kiya

Assignees

TS TECH CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20220608
Priority Date: 20220308

Claims (9)

1 . A conveyance seat having a seat frame with an actuator, comprising: a resonance suppressing portion which is formed in at least a part of the seat frame by a first uneven region formed by continuously forming a plurality of non-penetrating recesses and/or protrusions, wherein: the seat frame includes a seat back frame, the seat back frame includes a pair of back side frames which are arranged on both sides in the seat width direction and an upper frame which connects upper ends of the pair of back side frames, the upper frame includes inclined portions at both right and left end portions, the resonance suppressing portion is disposed on the inclined portion, a through hole is formed on the inclined portion of the upper frame, and the resonance suppressing portion is disposed at a position not overlapping an edge of the through hole.
2 . The conveyance seat according to claim 1 , wherein a plurality of the resonance suppressing portions are provided in the seat frame, and wherein the plurality of resonance suppressing portions are arranged at a position symmetrical with respect to a center in a seat width direction.
3 . The conveyance seat according to claim 1 , wherein the resonance suppressing portion is disposed above the actuator.
4 . The conveyance seat according to claim 1 , wherein the resonance suppressing portion includes the first uneven region and a second uneven region which has a narrower range than the first uneven region and is formed by continuously forming the plurality of the non-penetrating recesses and/or protrusions.
5 . The conveyance seat according to claim 4 , wherein the seat frame is provided with a recessed portion which is recessed inward in the seat width direction and the first uneven region of the resonance suppressing portion is disposed at a position avoiding the recessed portion.
6 . The conveyance seat according to claim 4 , wherein the seat frame is provided with a recessed portion which is recessed inward in the seat width direction, and wherein the second uneven region of the resonance suppressing portion is disposed in the recessed portion.
7 . The conveyance seat according to claim 1 , wherein the seat back frame includes a wire member supported by the inclined portion, and wherein the resonance suppressing portion is disposed to avoid a portion in which the upper frame supports the wire member in the inclined portion.
8 . A conveyance seat, having a seat frame with an actuator, comprising: a resonance suppressing portion which is formed in at least a part of the seat frame by a first uneven region formed by continuously forming a plurality of non-penetrating recesses and/or protrusions, wherein: the seat frame includes a seat back frame, the seat back frame includes a pair of back side frames which are arranged on both sides in the seat width direction and an upper frame which connects upper ends of the pair of back side frames, the upper frame includes inclined portions at both right and left end portions, the resonance suppressing portion is disposed on the inclined portion, the seat back frame includes a reinforcement member that connects both side portions of the upper frame, and the resonance suppressing portion is disposed on the reinforcement member.
9 . A method for manufacturing a conveyance seat having a seat frame with an actuator, wherein the seat frame includes a seat back frame, the seat back frame includes a pair of back side frames arranged on both sides in a seat width direction and an upper frame connecting upper ends of the pair of back side frames, the method comprising: preparing the upper frame that includes inclined portions at both right and left end portions of the upper frame; preparing the pair of back side frames; and connecting upper ends of the pair of back side frames via the upper frame, wherein: a resonance suppressing portion that includes a first uneven region formed by continuously forming a plurality of non-penetrating recesses and/or protrusions is disposed on each of the inclined portions of the upper frame, a through hole is formed on each of the inclined portions of the upper frame, and the resonance suppressing portion is disposed at a position that does not overlap an edge of the through hole.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is the U.S. National Stage entry of International Application No. PCT/JP2022/023066, filed on Jun. 8, 2022, which, in turn, claims priority to U.S. Provisional Patent Application No. 63/210,680, filed on Jun. 15, 2021; U.S. Provisional Patent Application No. 63/272,712, filed on Oct. 28, 2021; U.S. Provisional Patent Application No. 63/292,034, filed on Dec. 21, 2021; Japanese Patent Application No. 2022-035634, filed on Mar. 8, 2022; and Japanese Patent Application No. 2022-073659, filed Apr. 27, 2022, all of which are hereby incorporated herein by reference in their entireties for all purposes. TECHNICAL FIELD The present invention relates to a conveyance seat and particularly to a conveyance seat with an actuator. BACKGROUND ART Among vehicle seats, there is known one having an electric reclining device. The electric reclining device is operated by driving an actuator (electric motor) integrally attached to a seat back frame. Therefore, an operation sound according to the driving of the electric motor is likely to be transmitted to the seat back frame and the transmitted operation sound is transmitted to the ears of a seated occupant via an upper frame of the seat back frame. In addition to the reclining device, there is also an operation sound of an actuator for operating an electric height adjustment device or a vibration sound or an engine sound associated with a traveling vehicle. In order to suppress the resonance between the actuator and the seat frame, PATENT LITERATURE 1 discloses a vehicle seat including a plurality of through holes which open to an upper frame and a recess which is formed on a seat pad to communicate with the through hole. CITATION LIST Patent Literature PATENT LITERATURE 1: JP 2014-084053 A SUMMARY OF INVENTION Technical Problem However, the seat frame described in PATENT LITERATURE 1 requires a large number of man-hours for manufacturing since the through hole is formed in the seat frame and the recess communicating with the through hole is formed in the pad. The present invention has been made in view of the above-described problems and an object thereof is to provide a conveyance seat having a seat frame in which a resonance is suppressed by a simple means in a seat frame with an actuator. Solution to Problem According to a conveyance seat of the present invention, the above-described problems are solved by a conveyance seat having a seat frame with an actuator including: a resonance suppressing portion which is formed in at least a part of the seat frame by a first uneven region formed by continuously forming a plurality of non-penetrating recesses and/or protrusions. Since the resonance suppressing portion is formed in a part of the seat frame by the first uneven region formed by continuously forming the plurality of non-penetrating recesses and/or protrusions, the natural frequency of the seat frame changes and the resonance of the seat frame due to the operational vibration of the actuator can be suppressed. Since the resonance is suppressed by forming the first uneven region formed by continuously forming the plurality of non-penetrating recesses and/or protrusions, it is possible to provide the conveyance seat having the seat frame in which the resonance is suppressed by a simple means. Further, since the plurality of non-penetrating recesses and/or protrusions are continuously formed, the resonance can be suppressed without decreasing the rigidity of the seat frame. Further, in the conveyance seat, a plurality of the resonance suppressing portions may be provided in the seat frame, and the plurality of resonance suppressing portions may be arranged at a position symmetrical with respect to a center in a seat width direction. Since the resonance suppressing portion is provided at a position symmetrical with respect to the center in the seat width direction, the resonance can be suppressed even when the resonance of the seat frame occurs biased to either the right or left side. Further, in the conveyance seat, the resonance suppressing portion may be disposed above the actuator. Since the resonance suppressing portion is disposed above the actuator, the resonance of the seat frame due to the operational vibration of the actuator can be suppressed from being transmitted to the ears of the seated occupant. Further, in the conveyance seat, the resonance suppressing portion may include the first uneven region and a second uneven region which has a narrower range than the first uneven region and is formed by continuously forming the plurality of the non-penetrating recesses and/or protrusions. Since the resonance suppressing portion includes the first uneven region and the second uneven region narrower than the first uneven region, the resonance of the seat frame due to the operational vibration of the actuator can be further suppressed. Further, in the conveyance seat, the seat frame may be provided with a recessed p